Super Smash Bros. is currently scheduled to come to Wii U and the Nintendo 3DS, but work still hasn't started on either title. That update comes courtesy of project lead Masahiro Sakurai, who posted a quick comment on his Twitter account last night.
Sakurai's comments come on the heels of rumors of leaked spec sheets suggesting the title of the Wii U version of the game will be "Super Smash Bros. Universe." Sakurai noted all of his attention is dedicated to Kid Icarus Uprising, and that Smash Bros. "will not progress" until Icarus is completed. Sakurai also added that "characters have not been decided at all." Uprising was recently delayed into 2012.
The 3DS and Wii versions of Smash Bros. were announced at Nintendo's E3 2011 press conference nearly four months ago. Sakurai mentioned then that development hadn't started on either project, and that the announcements were more intended to facilitate eventual team assembly.