I think a healthy number will be gamers. Besides, non-gamers is probably the best market for SW:TOR right now. Gamers have played SW:TOR, and most of them decided it wasn't really for them. Star Wars fans will probably like it better.
look i feel for you i would be pissed off if they decided to cancel; at the last moment. but gamescom is their only european convention. you still have star wars centerd event while if they canceld gamescom i had nothing to there becouse there is no swtor is the only thing star wars there.