The only crossover I want to see between Mortal Kombat and Street Fighter is Warner Bros's money crossing over into Street Fighter's dev budget along with NRS's networking engineers crossing over into Capcom. They can keep everything else.
I have been out of the fighting game loop for a while but is MKX's netcode that good? I ain't even played it online despite owning the game, I just played the story. I became what I hated most, a casual.
Also Capcom fans are crazy for pretending this wouldn't be the biggest game to grace fighting games. The hidden 7 year old inside me is giddy with glee.