The Anti-Christ will be a Jew who is possessed by the devil. He will claim to be either a Prophet of Christ or Christ Himself. These other theories are not correct.
Hmm, I always imagine that the Anti-Christ would be the opposite of Christ in every way.
For instance, take His Virgin Mother. I think the anti-christ will have a mother who is extraoridinarily arrogant and self-centered. She will be the opposite of a virgin (you can probably guess what that would mean), and she would be haughty and quite rich and wordly. She will also probably hate her son (the anti-christ) and be disobedient to any kind of authority outside herself.
Maybe, the anti-christ might be a woman (if we consider female the opposite of male). That would make sense too; the modern era is pretty dominated by women (or it's heading that direction) these days, so I suppose it's possible. But whoever it is, he/she will probably be born into a very rich family (in opposition to the nativity) with much luxury about him.