I'm all for DC fighting games. However, I am in agreement that some of those costumes are...not right. And it'll be interesting to see if there's any type of huge imbalances like in MK vs DCU.
But. I also agree they should make an epic action-RPG. Something more than the JLH/Ultimate Alliance template. I'm thinking something like a mix of Dragon Age and Arkham series. Rocksteady can do it, what are they working on now that Arkham City:GOTY is done?