Personally, I would have liked to have seen MMH as a default character and NOT Cyborg(have him as DLC) since MMH has been a far more key JL member over time, for anyone who follows DC history you know this...
However, this MMH vs. Professor Zoom is no contest....Zoom(any version of Zoom) is merely a Flash ripoff. MMH should win that vote easily and rightfully so. You know MMH either way has to be in this game regardless.
P.S. I still want to see Doomsday in gameplay already!!!