Is this the same group mentioned in I Thess 4?
In my pre-wrath rapture view, yes. The great multitude of Rev 7:9-17 were raptured as per 1 Thes 4:16,17 and 1Cor 15:52.
The problem with my pre-wrath view is it doesn't coincide with the 'last trumpet' of 1 Cor 15:52. Other rapture viewpoints have other problems. - still working on all this :-)
But I don't think that bears on my views of a literal thousand year millennium or Satan being unbound now.
Have you considered Romans 8:18-25 in relationship to the above texts? Philippians 3:20-21 may be relevant also.