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"We are currently working with Windows/PC as the main platform, and maybe, if it makes sense, we will port it to Xbox 360, PS3 and WiiU in the future (ok, and maybe Xbox 720 and PS4!)." - Full Mojo Rampage website statement
I haven't heard a thing about this game (probably because I don't follow the PC gaming scene at all!), but the more eShop games the merrier as far as I'm concerned! The game would likely cost $15 as it does on PC, and if we hear a Wii U announcement you should start seeing trailers and screens pop up shortly thereafter!
Full Mojo Rampage website via Nintendo Life