I love DC, I always follow Injustice series, but I'm ridiculously more interested in MK.
Kinda middle term here: I wish they released the game and kept building it a little more. I love story, story is my first love in MK series, so I think it would be absolutely nice if they started adding later. You know, like secondary scenarios? I mean, Fujin should have appeared in MKX, but they decided to just cut him. It would be way better if they added a few chapters of him in the Netherrealm and what happened to them.
After these things in a while, I would be satisfied to have another game. I'm talking during the cue where they keep filling the game with guest characters and even MK characters, they could also add secondary stories and who knows, new game modes. They could totally revamp Motor Kombat or Chess Kombat, and I do think they should bring again Konquest mode, since everybody like MK:SM style, and they could have cutscenes and fights, just like Armageddon was (but could be more free roam as Deception).
I just don't think they should go ESO and start adding to the game so much that TESVI is almost a death sentence to wait. They could add a little more, enough to build for another game in a few years. I think the gap between MKX and MK11 is nice, I really don't want MK to become COD or BF or AC (after Ezio) because it just looses the whole build up and even the quality of the game.
Now those ideas, paid DLC? I wish it was just like what CAPCOM is doing with Resident Evil now. Alternate chapters = free DLC. Specially because everything here is ridiculously expensive, so I'm biased about it. MK is the only game I spend my money on release, all the others I usually wait. Next TES will probably be the same, I wish that for RE series, but I saved for MK