In an interview with French magazine IG, Hideo Kojima is going to drop a bomb on the Internet. The July issue of the magazine will feature Kojima taking a little about Metal Gear Solid 5 and how the FOX engine is being used to develop it.
Now initially there was some controversy surrounding the quotes, but IG has confirmed to CVG that the rumor is valid in their eyes and the quotes are accurate. I will bow out and let Hideo speak for himself.
"There will be a Metal Gear Solid 5 with the new FOX Engine… Metal Gear Rising: Revengeance never claimed to be a Metal Gear Solid. This is not a game about our beloved Solid Snake. It is a spinoff that tries something different. We have not yet finished with Solid Snake, despite the fact that I wanted to let him die at the end of Guns of the Patriots… About Metal Gear Solid 5, I can tell you two things. There will be much question of infiltration, espionage, and convincing people to give you 'a favour' like in the last Metal Gear Solid… I liked the idea of social interactions in Deus Ex: Human Revolution, but we will see. And if I say more, the female ninja public relations officer, who is behind the door, I will be carved up into pieces. So it's better that we meet again when the time comes to talk about Metal Gear Solid 5."