Website CVG is reporting that Nintendo is planning a major second half software blitz in order to pickup Wii U sales. Leading the charge, reportedly, will be the next 3D Mario title, by the same developers who made the incredible Mario Galaxy and Mario Galaxy 2.
Further, CVG reports that both Mario 3D and Mario Kart will be playable at E3... quote:
"A number of blockbuster Wii U games will be released from summer until the end of the year, one of which is a new 3D Mario title. Although CVG is not yet able to confirm what the others will be, a new Mario Kart will debut in playable form at E3.
The marketing campaign will commence at the Los Angeles event (although some claim sooner), where the 3D Mario game will also be playable on the show floor. The title will be released before October, pending development delays."
Also still planned is the Summer update, which will further refine the Wii U operating system's speed and stability. Sounds like interesting things in the works for the Nintendo Wii U!