That has absolutely nothing whatsoever to do with the ending of the Gospel of Mark. It seems pretty clear that you no knowledge of the Canon of the Bible, what it is or where it comes from.
Nothing for you, but God has testified He confirmed that word of Mark with signs following and Paul confirmed all those signs. ( all was fulfilled and questioned by non believers or acknowledged as the power of Gods word showing they are PROUD AND KNOW NOTHING.)
1 Timothy 6:3 If any man teach otherwise, and consent not to wholesome words, even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;
4 He is proud, knowing nothing, but doting about questions and strifes of words, whereof cometh envy, strife, railings, evil surmisings,
5 Perverse disputings of men of corrupt minds, and destitute of the truth, supposing that gain is godliness: from such withdraw thyself.
2 Timothy 2:25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the
acknowledging of the
truth;
Titus 1:1 Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the
acknowledging of the
truth which is after godliness;