Quote Originally Posted by The_Glyphstone
Cthulu Wins in a straight fight, Batman wins with preparation.

Or does he? What kinds of preparation can you get against Cthulu, anyways?
This depends on which Batman we mean.

The campy, 1960s Batman is immune to anything serious, which puts Cthulu at a serious disadvantage. Campy Batman wins. ;D

The psychopathic Batman Mary Sue who gloated over strangling Superman has already been converted by Cthulu, so there's no fight--Cthulu long ago took Batman Mary Sue's soul.

The real Batman recognizes that he's totally outclassed by a god, and calls in the Justice League, which collectively can beat Cthulu, driving him back into the insane reaches whence he came (for now--MUhaha!;D)