I wouldn't say this is MK vs DC 2. This game obviously runs on the new MK9 engine, which completely redid the Mortal Kombat franchise with much more complex inputs and combos and such.
Its MK vs DC in the sense that that is the only other DC game in this genre. I mean its still even made by the MK guys (netherrealm). It really is just DC vs MK 2 without the MK. Which is how I played that game after beating the story modes anyway
It will be interesting to see if they keep the "Finish Him" idea with this though. Having that always made MK better than Street Fighter to me. So hope they keep that for the DC solo game. Just don't make them as lame as DC vs MK's was