Matthew 27:52
And the graves were opened; and many bodies of the saints which slept arose,
Yep. Show me where 'Mary' (who was still alive at the time; Acts 1:14) was one of them. She wasn't. She did not return with Jesus to Heaven. One who might have, might be John the Baptist, but neither the scripture, nor historical source, nor SoP/ToJ say. They are not the 24 elders, who were already in existence even before this world was created, see Isaiah 24:23; Job 1 & 2, 1 Kings 22; 2 Chronicles 18, and the pattern (which existed in Heaven already) that was given to Moses (to pattern after on earth; Numbers 2, &c), etc.
Lk 16:19 There was a certain rich man, which was clothed in purple and fine linen, and fared sumptuously every day:
20 And there was a certain beggar named Lazarus, which was laid at his gate, full of sores,
21 And desiring to be fed with the crumbs which fell from the rich man's table: moreover the dogs came and licked his sores.
22 And it came to pass, that the beggar died, and was carried by the angels into Abraham's bosom: the rich man also died, and was buried;
23 And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom.
24 And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.
25 But Abraham said, Son, remember that thou in thy lifetime receivedst thy good things, and likewise Lazarus evil things: but now he is comforted, and thou art tormented.
26 And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence.
Luke 16 is a Parable in the midst of a series of Parables, and Jesus was speaking to the Pharisees, of which he always spake to them in Parables as foretold in Psalms. It also doesn't mean what you think it does, for we can simply identify the symbols therein. Want the evidence for that from the scripture?
rev 5:8 And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints.
24 Elders are not human. They are beings, Leaders, of the unfallen worlds, that were already in existence before the earth was created.
None of the texts you cite, say anything about "Mary" being in Heaven - at all. In fact, each of the texts you cite, are all before the timeframe of Mary's death.
4 “Beasts” (Living Creatures) – Ezekiel 1:5,13,14,15,19, 3:3, 10:1,2,3,5,6,7,8,9,15,16,18,19,20, 11:22; Revelation 4:6,8, 5:6,8,11,14, 6:1,6, 7:11, 14:3, 15:7, 19:4. See also the two cherubim on the ark, and the two greater Cherubim that Solomon made in the Stone Temple, making 4. “Living” also means filled with the Spirit of God, see Genesis 2:7.
“Beasts” = Kingdoms, and since they are Heavenly “Beasts:”, they are representing Heavenly Kingdoms/Waters, etc. Daniel 7:17,19; Genesis 49:9; Isaiah 27:1, 46:11; Jeremiah 4:7, 5:6, 12:8, 25:38, 49:19, 50:44; Ezekiel 17:3,7, 32:2; Daniel 7:7,17,19,23, 8:20,21; Joel 1:6; Micah 5:8; Revelation 13:1,2,3,7,11,12, 17:3,7,8,11,12, etc.
“Four” = universal; Genesis 2:10; Exodus 20:8-11, etc.
24 = 12x2, 6x4, 8x3, etc.
“elders” = “ancients”/”old”, “grayheaded”, also indicates “overseer”, leading positions.
24 elders = strong angels, leaders of the unfallen worlds, and are NOT (*) human. - Revelation 4:4,10, 5:5,6,8,11,14, 7:11,13, 11:16, 14:3, 19:4; Isaiah 24:23 (ancients), see also Ezekiel 8:15-17, 11:1-2. See also the type in the OT on earth, which mirrored that which existed in Heaven - Numbers 1:50-53, 2:2-3,5,7,10,12,14,16,17,18,20,22,24,25,27,29,31,34, 3:17,23,29,35,38; Deuteronomy 1:15; 1 Chronicles 27:1-15
What about Revelation 5:6, “redeemed us”? This is only a single text, and is not to be abused/wrested. It must always be in the mouth of two or three witnesses. How we know that they (24 Elders) are not human -
1. They already have crowns. The saints (human) of God, do not get those until their resurrection/translation. 1 Thessalonians 2:19; 2 Timothy 4:8; James 1:12; 1 Peter 5:4, see also Hebrews 2:7,9; 2 Timothy 2:5, as Jesus received Crown.
2. They already have white robes. They are sinless.
3. They do not ever appear in Revelation with victory Palms, but only the human saints who were resurrected and translated do.
4. We know who they are NOT – They are not the Apostles (12 or Paul), since they are all still deceased in the first death (for they all died after Jesus ascended, and John is the one writing Revelation on the Isle of Patmos), and not resurrected. They are not any of Adam, Noah, Job, Abraham, Isaac, Jacob/Israel, or any of the 12 Sons of Jacob/Israel, David, since they are still deceased in the first death, and not resurrected (see Hebrews 11, Abraham, etc is still waiting, see Acts 2, David is still waiting, etc), and it only included a special group that was buried around Jerusalem (thus possibly John the Baptist, but scripture, and SoP/ToJ do not ever say who or how many). The only other humans in Heaven before then was Enoch, Elijah, Moses.
5. Some try to link the special resurrection around Jerusalem, in Matthew 27, when Jesus resurrected to the '24'. Yet, we are never told in any location exactly who or how many were in that special resurrection, and there is no indication of young or old – see Psalms 24:1-10, 68:18; Ephesians 4:8; 1 Corinthians 15:20,23; Isaiah 26:19.
6. Neither Jesus, nor the specially resurrected saints from Jerusalem, nor even the 'angels' are seen in Revelation 4, at all. It is only the Father, the 4 Beasts (Living Creatures) and the 24 Elders/Ancients, which are all already present before Jesus even shows up with 'victory train'.
7. Jesus shows up, along with the angels in Revelation 5, after which we were already introduced to the 24 Elders/Ancients in Revelation 4.
8. The “thrones” (principalities, powers, etc) of Heaven, already existed before earth was even created, see also John 14:1-3 (a place, which was vacant by the angels which left their first estate/(arch)offices); Matthew 18:10-14; Luke 15:3-7; Revelation 12:12; Hebrews 1:2, 11:3; Job 1:6, 2:1; 1 Kings 22:19-24; 2 Chronicles 18:18-23; Colossians 1:6; Isaiah 14:13; etc.
9. The 24 Elders have in their hands the “incense” “with” the “prayers of the saints”, which means they are praying/singing on behalf of someone else, see that Angels, etc carry prayer to heaven, Daniel 9:21-23, 10:11; Matthew 18:10; Acts 10:34, and see that Angels are “ministering spirits” - Hebrews 1:7,14; Psalms 104:4, and thus connect with Revelation 5:8-11. Jesus speaks on behalf of the Father (and comes in the name of the Father), and the Holy Ghost speaks on behalf of Jesus (ie, comes in the name of Jesus).
What then about the “crowns” that the 24 Elders wear, are they not a “stephanos” (a victory crown)? They are “stephanos”, but this can simply mean a crown worn, though it can also mean a victory crown (didn't Jesus also win the victory for the heavenly beings also? Rejoice ye heavens, etc, Revelation 12), see also Revelation 9:7, wherein the 'locust' also have something like a 'crown' (stephanos). See also the so-called LXX (work of Origen, etc) uses, wherein it is just a crown, see so-called LXX 2 Samuel 12:30; 1 Chronicles 20:2; Esther 8:15; Psalms 21:3, 65:11; Proverbs 1:9, 4:9; Job 19:9, 31:36; Ezekiel 16:12, 21:31, 23:42; Isaiah 22:18,21; Song of Solomon 3:11; Psalms 102:4, and see also the LXX (Apocrypha) 1 Maccabees 10:20, 13:37,39; Sirach 6:31, 15:6, 32:2, 40:4, 45:12, etc. The other worlds also had tests similar to that of Adam. They never sinned.
For the Seventh-day Adventist:
(*) SoP/ToJ – Letter 65, 1898, par. 18; MR 12 (921-999), 296.4; MR 20 (1420-1500), 197.3 – (citing Revelation 5:5; “elder”) - “... that one of the strong angels had compassion on him, and laying his hand on him assuringly said, “Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof. ...”
(*) SoP/ToJ – Sermons and Talks, Volume 1, 35.2; Signs of the Times, Dec. 22, 1887, par. 7 – (citing Revelation 7:13-15; “elder”) - “... And the angel answers, “These are they which came out of great tribulation ...”
On earth, as it is in heaven (stolen by occult as “As above, so below”) - Matthew 6:10; Luke 11:2