I guess Solid Snake and Sonic shouldn't be in the same game!
Oh and also, Marvel vs Capcom shouldnt have been made! /sarcasm
Seriously Mr T, ITS A FUCKING GAME!
marvel vs capcom is a horrible example, since it is its own universe with marvel & capcom co-existing
soul calibur is its own universe with just Soul Calibur guys, and guest dudes who get teleported into it somehow
but i agree, this is silly