I just play characters I like, not even knowing what kind of "style" they will presumably have, and just work with the tools given. Character loyalty is always my downfall, but I play games first and foremost for fun, then competition. That said, Noob's always gonna be my main in any MK he's in. Played him since his broken inception in MKT. He's considered a "zoning" character, but I don't play him as such. I play more rush down and forced mix ups/resets on wake up with him, which is against the norm but fairly effective for me.
Now for Injustice. I don't care for DC comics much (Marvel fan) but this game does look fun and will more than likely be the precursor to MK10, so I'mma try it. Doomsday, Superman, and Nightwing have my attention, but I'm open to anyone until someone does catch my full attention.
For zoners? Go with Green Arrow. He looks to be a serious force to reckon with from fullscreen for zoners. Also Cyborg looks legit for pure zoning as well.