When the antichrist sits in the temple:

II Thessalonians 2:3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;

  4 Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.

Where does he sit?

Will the ark be found and brought to the rebuilt third temple?

Will the mercy seat still be there, on top of the ark?

Will the antichrist actually sit upon the mercy seat, declaring himself to be God?