I remember playing this when it was on Playstation, I think. I forget. I remember I was very young - and I'm 16 now. I never payed attention to the plot. I just fought and battled my brother.
I remember it being considered violent. Ha! The blood is so fake.
I used to memorized the fatalities for most of the characters. Haven't played it in a while. Have it, though. I'll probably get back into it over Christmas Break.
I really want MK vs DCU. But I don't have a PS3 or XBox 360 =/