The Antichrist will be revealed. After the rapture everyone will know who he is.

2 Thessalonians 2:6-7

And you know what restrains him now, so that he will be revealed in his time. For the mystery of lawlessness is already at work; only He who now restrains will do so until He is removed.

Rapture 59. One Second After the Rapture Part 3. Revelation 13:16-18
It is a waste if time trying to figure out who he is.