“...for I will cause their captivity to return, and have mercy on them.”
This is a prophecy of their return to the land after the Babylonian captivity: a captivity that was decreed to end under Cyrus. This has nothing to do with an “end-time Israel” scenario as you describe it.
Tell us the dimensions of the Temple that was destroyed and the Temple that is commanded still to be built and if they are the same.