The Sign of The Son of Man in Heaven

One of the arguments Pre-Tribbers have for separating Matthew 24's Parusia from the Parusia of Paul in I Thessalonians 4, I Corinthians 15 and II Thessalonians 2 is that the Resurrection isn't in Matthew 24.

Now my main response to this in the past had been that none of the Rapture passages include everything that happens at that time.  1 Corinthians 15 is agreed to be a Rapture passage by most Pre-Tribbers and yet it technically doesn't mention the Rapture (us being gathered in the clouds) at all.

However a chief argument of those of us who definitely see them as the same Parusia is that Matthew 24 is the focal point of this doctrine.  Jesus here brings together Hebrew Bible themes that weren't obviously directly connected before, and then Paul and Revelation are building on Jesus when they are referring to these same ideas.

Separately I've been unsure what to think of "The Sign of the Son of Man in Heaven".  Does it correlate to the Ark being seen in the Temple in heaven after the Seventh Trumpet?  Is it the Wonders that open Revelation 12 which I also connect to the Signs in the Sun, Moon and Stars of Luke 21?  I'm willing to bet someone in history has tried to apply to it Constantine's claimed Milvian Bridge vision.

Then I decided to see if studying how Jesus spoke of signs elsewhere could be helpful.  And indeed earlier in this same Gospel in chapter 12 Jesus makes clear the ONLY sign that will be given to a wicked and adulteress generation is the Sign of the Prophet Jonah.  For as Jonah was in the Ketos three days and three nights so shall the Son of Man be in the Heart of The Earth three days and three nights.

Now every Christian agrees the Resurrection is implicitly the point here, someone being dead for three days isn't unusual, it's them not being dead anymore that is the Sign.  Jesus' Resurrection was the Sign given to that generation.  But the generation that sees the Parousia will also be a wicked and adulteress generation.

It should also be understood that no Jews see the Son of Man in Daniel 7 as a specifically Messianic Title, they see Him as being Humanity as a whole in our restored state.  In my view this does not contradict the New Testament's usage of it as a title for Jesus, it is in Jesus that Humanity's Redemption from the fall is achieved, it is in Him that The Resurrection began, The Parousia is when it expands to include all of The Church after the Millennium it will expand further to include all of Humanity.

So The Sign of The Son of Man in Heaven is the Bodily Risen Saints ascending into Heaven/The Sky.