Hideo Kojima already has three ideas for Metal Gear Solid 5, he told 1UP.
"I have three concepts for MGS5 already. What would be ideal for me with MGS5, though, is that we don't do those," he said. "If the team picks one of those concepts, I have to get involved again, which I don't want to do.
"There are already so many good ideas from the staff, so if we select one of those, that would be really good. At that point I could really rely on them and take the step back to be the producer, which is the ideal situation, I think."
He also has ideas floating around that have nothing to do with Metal Gear, though.
"Well, I want to create something new, and it's difficult to explain since no one's seen it before. I don't know if it would sell very well," he told the site.
"I've been warming this up for a long time, and I keep thinking that I'll try this idea. But ideas always change, so I really don't know what the final outcome will be."
More through the link.