At Nintendo's E3 press event, Nintendo honco Satoru Iwata revealed that Smash Bros was heading to the Wii U and the 3DS. There are no screenshots of the games. Nothing. That's because work on neither title has begun.
According to Smash Bros designer Masahiro Sakurai, "Honestly, at this point, we shouldn't be announcing these games to the general public, but since we need to assemble developers for the games, we made them public."
Sakurai added that work on the games has not started, and their future is dependent on the ability of those recruited to work on the titles.
Sakurai heads up new Nintendo subsidiary Project Sora, hence the interest (and need) to recruit development staff. Super Smash Bros Brawl was developed by a variety of studios, including Monolith Soft and Game Arts.
【Multi】E3 2011：Wii U＆3DS『スマッシュブラザーズ』の開発がアナウンス。両ハード版の連携もあり [ゲーム情報！ゲームのはなし]