I think TPP is a great game, but from what I can gather the best parts of the game where the things he had least hands on.
The graphics, engine, and gameplay were all phenomenal, some of the best this gen, but that's a team of devs and other designers that work on that stuff. I'm sure kojima had to sign off on it, but I don't think he deserves credit for all that.
The stuff I know he had direct control over. The story, production, direction of the game was all a mess. Same for MGS4.
Now if they said they were bringing tho whole team and engine from Konami, then I'd be all in. But as it stands I gotta see more before I'm getting excited over this shyt.