Here is an idea I came up with last night.
I was thinking that in a future MK game, during intros (if they're kept) in single player, the following things could sometimes happen
One possibility is that your opponents would suddenly be killed by another character, or more, and you'd end up fighting him/her/them instead. Basically, imagine you're just expecting to fight Quan Chi, but either he gets killed and you find yourself in a endurance fight against two or three opponents instead or, Quan Chi doesn't die but receives assistance from other characters, still leaving you in a endurance fight. If the game had more than one sub-boss again, the unexpected opponent(s) could be the one(s) you're not going to fight before the final boss.
What I'm suggesting could happen in absolutely any fights, even the first. Bosses would be the exception and not get killed in their intros.
Another possibility is that your character would be attacked during his/her intro, and you'd have to fend off the assault. Let's say you're playing as Baraka, and you see a hell hole open up in front of him. Scorpion would unsurprisingly come out of his hole, and Baraka could just greet him with his blades. Sometimes however, Scorpion will be smarter than that and fool you by opening one hellhole, and then popping out from behind. He could even mess with you by opening countless hellholes. When he'd come out of one, you'd need great reflexes to fend off his attacks.
Just something I thought up to keep the game excitingly challenging.
