The game may sneak on to the Wii U as early as October.
http://www.nintendoworldreport.com/news/37946/stealth-inc-2-gets-a-potential-release-date-new-details
Curve Studios is aiming to release the Wii U exclusive Stealth Inc. 2 this October.
A 2D platformer focused on sneaking around, Stealth Inc. 2 features exploration-based "Metroidvania" areas along with the ability to post messages on Miiverse that will appear on other players' walls. Curve Studios has infused a dark sense of humor into the sequel, though unlike the original it will be more apparent from an earlier stage in order to let players who don't finish the game experience it. A level editor is included which, along with advanced sharing capabilities, will add to Stealth Inc. 2's extensive content.
The first title in the Stealth Inc. series was released on multiple platforms, including PlayStation systems and mobile devices. However, it never came to a Nintendo console or handheld.