3D needs the right hardware to work.
DCU VS MK was great with soso hardware.
That game gets knocked by most MK fans as one of the worst, yeah the hardware was part of it but it just didn't feel like MK should. Ed Boon was asked about going back to 3D during some of the press stuff leading up to this and he seemed to not be very big on the idea. I do wish they'd make another action game like Shaolin Monks, something God of War ish with MK characters would be a lot of fun and you could work the combat around that type of game, an MK fighting game has to feel like MK not soul caliber with fatalities.