Following all the hubbub surrounding GDC, this little tidbit was almost overlooked. During his Apple Store visit after his GDC keynote, Hideo Kojima was asked about Metal Gear Solid 5. He didn't answer the question outright but he did drop this hint:
I can t really speak specifically right now. All I can say right now is that maybe we can do some announcement during E3.
We already know that he's announcing a new game at E3 this year, so was this a hint that the new game will be "The NEXT MGS " game that he teased us with during GDC? At any rate, any Kojima game is a good Kojima game, so let's just cross our fingers for that.