WMG- They all became Politicians and Lawyers who worked to keep the Super Heroes down. In fact, I’ll bet you anything that the Super Hero Relocation was actually a very cleverly concocted plan by all of the Super Villains.
I <3 this idea, Pixar Builder! BTW, are you an evil genius? 
Yes I am! MUHWHAHAHAHAHAHAHAHAHAHAHAHA! Pixar Planet is MINE! 
Actually, I think if TI were to come out with a spinoff, this might be a really interesting premise.
This is a very good question that I never thought of before, but that’s because I was too into the story to even think about it. The only other villains seen in the film besides Syndrome that I would have thought of as Super villains would be Bomb Voyage (only seen briefly at the beginning, got away, and never seen again), and The Underminer (I kind of assumed that he was a mysterious, elusive villain nobody knew about cause he was working on his plans beneath the earth for years). Of course we saw so little of either of them that, for me anyway, it never seemed to raise the question of it, because the story’s focus villain was Syndrome and that’s where I was as well.
Ahahahaha. And it would be interesting, but sequel>spinoff.
Flik-E, I never thought of it before either.
Hey, great idea. It really does keep the bad guys busy and it is a very subtle way to keep the SUpers down.