How About That Whole Pope Resignation Thing?

None of the Popes have been or ever will be the antichrist/an antichrist or otherwise enemy of God.
the bible quite plainly states that all receive the mark, pope included.

Revelation 13:16-17
King James Version (KJV)

16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:

17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.