core gameplay should be fun, story, art-style etc.. are all after the fact. If it isn't fun with stick-figures then it won't be fun with photo-realstic characters, a dramatic plot and epic music.
Find a buddy or two and whip up a prototype, nothing big, a level or even a piece of a level, that can show the gameplay/overall experience in a compact package. Like Justin said, if it isn't fun with stick figures it isn't going to be fun in full next-gen or stylized or whichever art direction you choose. Starting small…
Agree with everyone else, everyone has ideas for games so you have to be able to put in some hard work to get your idea across along with putting in the work to make it. My best advice, if you have your design docs and ideas, but don't have the know how yet on how to do it digitally, make a board game. Lots of games start…
What everyone has said here is pretty nice and accurate and said a lot less nastily than I would have written it, if I had seen this thread earlier. I, too, have hundreds of pages of "design" docs for a game I wanted to build. The problem I had with not knowing anything about art or programming is that they're not the sort…