Car crashes, surgery and wire work: what the hell is Hideo Kojima mo-capping?

For the last few weeks Hideo Kojima has been tweeting picture of mysterious mo-cap sessions: car chases, people hanging upside down and tables full of surgical instruments. Here’s eveything so far in chronological order.

While most people are pointing the finger at something to do with Metal Gear Rising, that seems unlikely. While it is still a Kojima Production it’s being developed by Platinum Games and seems odd that Kojim would be involved in mo-cap rehearsals. So is this MGS 5 or Project Ogre?