Yeah, I think a combination of things would be nice. I liked the krypt, thought it added more bonuses, but in MK6 I'd prefer having only bonus material and extra costumes in the krypt. Then add a few extra characters unlockable like smoke and jade in MKII, win enough and then beat them and unlock them as playable. Then I'd like it if you could play as the boss and sub-boss, then I'd like what Sub_Zero_13 said, it's like Reptile from MK1, but with a modern twist.
