Source: dccomics.com

4. Bizarro

A failed clone of Superman, Bizarro is the DCU equivalent of Frankenstein's monster. Or, I mean, he would be if Frankenstein's monster wasn't already a DC character, but never mind, not the point.

Bizarro varies based on depiction and character version, but he's usually portrayed as a misunderstood creature, whom Superman doesn't so much fight as rehabilitate.

It would make a nice counterpoint to Man of Steel to see Superman deal with a threat that can't be solved by punching it in the face.

Ok, ok, I get that Bizarro probably couldn't carry a movie by himself, but he would work as a minion of someone like Luthor. In fact, I would much rather have seen him in Doomsday's role in BvS. At least Bizarro's a character, Doomsday has never been more than a plot device. Poor Bizarro, he never gets his due. Although I concede the backwards speak can get a little annoying at times.