Yes. I explained before how the things spoken about in Bible prophecy aren't always in chronological order. That is clearly the case in other prophecies like what we see in the book of Daniel and the book of Revelation, for example. Not sure if you saw that post or not.
I believe Jesus started talking about things related to His coming and the end of the age, pivoted to talking about things related to the destruction of Jerusalem and the temple buildings, then went back to talking about things related to His coming and the end of the age for the rest of the Olivet Discourse.
There is a single but significant word appearing as the third word in verse 15. Undoubtedly you've heard the timeless little Bible study adage "If you see a 'therefore', you gotta find out what it is there for."
Here are some of Strong's definitions of "therefore":
1. οὖν a conjunction indicating that something follows from another necessarily;
2. Hence, it is used in drawing a conclusion and in connecting sentences together logically, then, therefore, accordingly, consequently, these things being so
3. with other conjunction οὖν, so then, Latinhincigitur, in Paul; see ἄρα, 5. εἰ οὖν, if then (where what has just been said and proved is carried over to prove something else)
4. HELPS Word-studies
3767 oún (a conjunction) – therefore, now then, accordingly so. 3767 (oún) occurs 526 times in the NT and is typically translated "therefore" which means, "By extension, here's how the dots connect."
If verse 14 is the Second Coming, but verse 15 is the DoJ, then verse 14 fails to satisfy any of these definitions of "therefore":
1. οὖν a conjunction indicating that something follows from another necessarily;
If verse 14 is the Second Coming, then verse 15 as the DoJ cannot and does not follow from verse 14.
2. Hence, it is used in drawing a conclusion and in connecting sentences together logically, then, therefore, accordingly, consequently, these things being so
If verse 14 is the Second Coming, then verse 15 as the DoJ is not a conclusion that can be drawn from verse 14.
3. with other conjunction οὖν, so then, Latinhincigitur, in Paul; see ἄρα, 5. εἰ οὖν, if then (where what has just been said and proved is carried over to prove something else)
If verse 14 is the Second Coming, then verse 15 as the DoJ is not proven by verse 14.
4. HELPS Word-studies
3767 oún (a conjunction) – therefore, now then, accordingly so. 3767 (oún) occurs 526 times in the NT and is typically translated "therefore" which means, "By extension, here's how the dots connect."
If verse 14 is the Second Coming and verse 15 is the DoJ, then there are no dots to connect because they refer to two different events.
Conversely, if both verse 14 and verse 15 are the DoJ, they are connectable dots.
Thus, the significance of a "therefore".