Nintendo has dropped a huge bomb on us at the start of the Smash Bros. flavored direct. The 3DS version will be released this summer, and the Wii U version will be released this winter. Yes, that's months after the 3DS iteration.
Wow! That's one way to get you to buy the game on 3DS. Smash director Sakurai notes that the 3DS version will run at 60fps, even in 3D, but some of the Pokemon will run at 30fps. It looks pretty great so far, but I know more than a few people will be pissed at this development.