I honestly wouldn’t mind seeing 2K trying their hand at an MMA game. I know they get their fair share of hate for the NBA and WWE games, but I think both of those are very good games. The NBA series has arguably the best franchise/mygm mode of all sports titles and WWE consistently has the best character creator mode of almost any game that I have played. Both of these games also have excellent presentation.
2K is a huge developer that would have plenty of budget to produce a quality product if they went all in. Another MMA game would be great and it would force EA to improve the UFC games.