Olawd, not possible without a big team, esp. with the talent on this forum(with the exception of a few obviously.)
JevaEngine (I've since changed the name..) took me a years of work alone, and that was before I got a team.
You could build off a really thick game engine if you can get the license, but the game engine is only the begining, alot of the assets you'll find are a lot more difficult to acquire & build then you initially thought.
My hands are cold so I'm not going to spellcheck\writemuch.