Latest character I picked in MK9 was Scorpion. Never before thought he is so fun to play once you can reed opponent. Once a solid gameplay was developed the mindless vortex cycle was no more and actually I started to win many mu, even against Cage. Problem maintained with Sonya, Cyrax, Kitana but other then that hell fire spears, AA into vortex all day long.
So I hope he's got what he had and a decent additional pack of tools that would make him complete.
Raiden:
The teleportation heavy variant may allow him to do, escape and apply some sick mind fuck setups. Seems like he may have several layers of offense and defense options.
Ermac:
Since two years I could say I am being fuck with Cyraxs draining NET on daily basis. This move changes so much in gameplay (my meter management). So the moment I saw Ermac MK9 veriant has ex lift with draining ability I decided to pick him up. Other then that he deals in souls possession I kinda do as well, so I find him now more interesting then ever before.
Kung Lao:
It is still my main in MKII. First character I picked in MK9 but then for some reason dropped him. Well, now I think it's time to return my first ever MK main I had years ago. Besides he may be much complex and high end character then he ever was in MK9.