The top three MMORPG releases I'm looking forward to in 2010 are Cataclysm, Star Trek Online, and Star Wars: The Old Republic. That is in order of preference, not release dates. Of course I'm prepared for the possibility that any of these, or even all, could end up being a disappointment. But then again Cataclysm could revive the lower levels of WoW, SWTOR could become the second game with over a million subscribers outside Asia, and Star Trek Online could surprise us with gameplay which is markedly different from the usual fare.
What MMORPG releases are you looking forward to in 2010? Anything you think could become a sleeper hit?