A reliable source told iWaggle3D today that the Raiden-centered MGS spin-off Metal Gear Solid Rising has switched developer, escaping Kojima Production to infiltrate Platinum Games (Bayonetta, Vanquish). Viewtiful Joe and Bayonetta creator Hideki Kamiya is apparently directing the game.
But wait, there is more...
While unable to confirm nor deny Move support for Rising, our source shed some light on future plans regarding the MGS franchise as a whole.
Besides confirming the PS3 remake of Peace Walker (likely to be a "PSP Remaster" with possibly 3D support, albeit he couldn't tell for sure), he also revealed that the next installment in the "main" MGS franchise (Metal Gear Solid 5, basically) is scheduled for this generation as a multiplatform release, with PS3, Xbox 360, NGP and "possibly 3DS" mentioned as landing platforms.
Finally, PC ports of MGS1, MGS2, MGS3 and MGS4 are bound to be released digitally via Valve's e-Commerce portal Steam.
Of course, like with any rumor, you might want to digest all of the above with a pinch of salt. While I have no reason not to trust the source that shared these details (I wouldn't relay this information to you otherwise), internal production plans can change, so...
Hopefully the upcoming E3 will set things in stone with some official confirmations from Konami.