Don't worry, Nintendo's unveiled their upcoming Wii U lineup, it can't fail:
Mario Kart U
Super Mario 3D
Super Mario 4D
New Super Mario Bros. Z
Old Super Mario Bros.
Mario's Mansion
Mario: A Mario to the Past
Mario Party: The Hangover
Mario Vs. Mario
Paper Cardboard Mario
Clay Mario
Macaroni Mario
Paperclip Mario
Zombi Mario
Xenomario
Just Mario!
MBA 2K14 (Mario Basketball Association)
F-Ze… Mario Race
New IP (starring Mario)
If that doesn't sell systems nothing will.
Mario 3D and Mario Kart are my favorite gaming franchises, just poking a little fun. I think Nintendo will double down on Mario to try and save the Wii U.
What else can they do? Not a chance a new Smash Bros (especially with Sakurai's problems) or Zelda could be ready this year, and they already played the 2D Mario card. It's basically all on Mario Kart's shoulders.