Two things we're quite sure of regarding Ms. Splosion Man, the next game from Twisted Pixel and semi-sequel to Xbox Live Arcade game 'Splosion Man: it is coming to Xbox 360 this Wednesday, July 13 for 800 Microsoft Points.
That's straight from the developer's press release on the matter.
The other thing we're not so sure of (yet). But Rock Paper Shotgun spotted a Steam listing, since removed, for Ms. Splosion Man, potentially a clue that the game is not merely an Xbox Live Arcade title, but a future PC release as well.
Twisted Pixel released The Maw on PC in 2009, but its most recent efforts—'Splosion Man, Comic Jumper and the forthcoming Kinect shooter The Gunstringer—have been Xbox 360 only jams.