"For the next game I make, it's either MGS5 or an original game. I only have these two choices," explains Kojima. On the possibility of a new Zone of the Enders game, he doesn't have good news: "Regarding Anubis and so-forth, sorry -- those will be pushed a bit into the future. I'm 47 this year, and I don't know when something might happen."
While Kojima would not give any details on his next project, he did mention that "the next project is amazing. The plan is pretty much solidified. Although recently, it has wavered a bit."
There are tidbits of information within the full feature: the game's engine is up and running, but specific platforms are not mentioned and it will be released after the rest of Kojima Productions' slate. That is, after Castlevania: Lords of Shadow, Metal Gear Solid Rising, and Metal Gear Solid 3D for the 3DS.
Additionally, even though Kojima directed the Metal Gear Solid 3D demo for Nintendo, he may not direct the actual game. The demo was secret within Kojima Productions and only those involved knew about the demo, which was produced by the Peace Walker team. As for the next game, Kojima's top staff are on the project.
Despite all of this information, it is still unclear if Kojima's next project is MGS5 or a new property. It is also unclear if doing the original project would absolve the developer from doing MGS5. Konami's confirmation seems to suggest that gamers will be seeing Metal Gear Solid 5 at some point. Although Metal Gear Solid Rising will be released on the PC, PlayStation 3, and Xbox 360, it remain to be seen if a new Kojima-directed game will end up on a non-Sony platform.