Yeah I'm quite happy for him to be able to be free up to do what he wants. From a gameplay, story and thematic point of view he is free- many people criticised various gameplay, character, story and other bits of content in his other games since... well MGS2 to be honest. "It's not MGS". "that's not how the character should be" "Not realistic" "Open world?" etc.
I'm sure that Kojima has had ideas that he has either not fully implemented, or cut entirely, from his recent titles (both MG and PT which obviously ended up gone) that he will be able to just put wholesale into his new game because he is absolutely free up to do so without 'damaging' some sort of legacy which people expect. As much of a creator as he is, he has made various statements in the past about what peoples expectations are, and the whole 'coming back for another metal gear' thing is obviously something that would weigh on him.
I can't wait. I just want to have an idea on what KIND of game we are talking about. Not the whole thing... but like when MGS2 trailers came out... we got 8 minutes of batshit insanity, filled with gameplay AND story.