Eddy Wang
Skarlet scientist
So far its looking good
If there is anything i would really expect to see it would be a portal stage, either this:
Or this
More the DA stage over the first for several reasons, i think the DA Portal was a lot more elaborated which was great, just imagine having a portal vortex sucking debris into it while people are fighting on the foreground it would be sick.
And lastly i would really like to see the Living forest again, i think it was a very well made stage in MK9 and i couldn't help playing on it whenever i had the chance
Another good way of doing this, is having at least one representative stage from each franchise would also be a good idea