3. Red Tornado
Alright, alright. I can see you getting mad about now. Settle down, and I'll try to explain. For those unaware, Red Tornado is essentially a robot. But, as you could probably predict, various scenarios depict him as either thinking he's human or trying to become more human. He's been around for awhile and many fans likely have some adoration for him. Still, this is a robot whose power (besides predictable robot strength) is making high-speed wind. Oh, and he dies a lot. A LOT. But gets repaired. In a movie, this would become beyond lame. His death would mean nothing, and his powers are somewhat laughable. You created a robot and gave him... wind powers? He's had some nice storylines, but he'd be a hard pill to swallow in a stand alone movie.