Brawl was also only in trailer form. Sony doesn't rely on first party stuff either, so it's a bit weird. They have no control on how 3rd parties make their announcements, only on how they do their hardware launch. It's different from the PSP year too, in that everyone was enamoured with the PSP because it looked great and felt great. DS never got traction until the two Catch! Touch! games came out with Nintendogs. Up until that point, DS and PSP were kinda neck and neck.