SWTOR is also slated for Spring 2011... so I have to believe that one of them will either push for earlier, or delay their release. Both releasing simultaneously, despite being different genres completely, has to negatively affect sales to a certain degree. I'd think there'd have to be at least a 1 month delay in between them.
That said, I'm hoping for anything that's NOT close to April 17th when I have a planned 10 day trip. I'm torn between wanting it asap, and wanting it AFTER the trip (blasphemy, I know) just so that I don't miss out on the first week+ of release. THAT would suck. I'd consider canceling the trip, but imagine trying to explain that one to my gf. Hah!