Nintendo of America President Reggie Fils-Aime recently conducted an interview with gametrailers.com, talking about all things Wii U and no doubt mentioned that "it's all about the experience" on at least one occasion. When asked about future Wii U projects, Fils-Aime stated that arguably Nintendo's highest profile development resources, Shigeru Miyamoto/EAD and Retro Studios, are both currently focused on unannounced and major releases.
Rest assured Mr. Miyamoto and the team at EAD are working on fantastic projects. Rest assured that Retro is working on a fantastic project. We’ve got big games in development that will be coming, games that will continue to drive the install base of the system. All of that’s going to be there.
When can we expect to see these games? It's apparently very likely that they'll first appear at E3 2013, but if development progress allows there may be announcements before then, no doubt through a Nintendo Direct broadcast.
The question is, what games will these teams be working on? We'd like the think that Miyamoto and the EAD team are working on a 3D Mario, and the rumours of Retro Studios being entrusted with The Legend of Zelda will surely re-surface. So, go on, speculate wildly in the comments below.