I don't think the New Jerusalem will have a Temple. Seems contrary to Rev 21:21-27:
"The main street of the City was pure gold, translucent as glass. But there was no sign of a Temple, for the Lord God--the Sovereign-Strong--and the Lamb are the Temple. . . ."
Regardless,
The Anti Christ is not going to enter the New Jerusalem and his image or some such will be set up in the Holy of Holies well before (3.5 years?) the arrival of the New Jerusalem. When the AntiChrist's image is set up in the Holy of Holies, the Jews will realize they've made a covenant with the wrong dude and flee for their lives as Scripture indicates.
imho.
Hold these thoughts I really want to get into them as this study goes.