Of the choices given Kirby. Of all games shown, Golden Sun.
EDIT: upon closer reading of the question, I see you said "revealed", which I guess is not true for Golden Sun, as it was revealed last year.
Though I guess I'll use this edit to tell my opinions on some of the others mentioned. The Kid Icarus, DKC, and Kirby games look really good to me. I'm fairly meh about Epic Micky at the moment. I am really doubtful that the Goldeneye game will be any good (cite the Perfect Dark sequel). And I don't like how the Zelda game is entirely controlled with the motion controls. If they have a non-motion control option I'd get it, but as it stands not likely.