Quote by Shiael74
iirc Batman did defeat Superman in one of the comics. He created this battlesuit and found some kryptonite. Batman just held exposed Superman to the kryptonite until he dies. I think Darkhorse comic put it out.
DC is the publisher of Batman and the story you are describing sounds like "The Dark Knight Returns" by Frank Miller.
http://www.darkknight.ca/storylines/tdkr.htmlAnd if it is, Superman does not die. ^^^ read the above link.