Become a Titan
This one may be very close.
Marvel vs DC. Who would win?
I'm going to give this to the Lizard. He's got super strength and the ability to control reptiles. Killer Croc is inhumanly strong but I doubt he's anywhere near the Lizard's class.
Lizard. Strength and intelligence! Croc is just muscle.
Lizard is cuter* (and a more stylish dresser)!
[*Though not even 1% as cute as I am!]