Matthew 24:22-23 KJV
[22] And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
[23] Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
After the tribulation has been shortened, Then the false Christs come in the scene... does that a mean the antichrist doesn't come on the scene until the great tribulation is over?