The problem with the idea isn't the idea itself. It's the work needed behind it. Lots of people are all hyped up until they see the amount of coding, editing, fixing, drawing, editing, fixing, scoring, more coding, bug fixing and all those other things that come with the idea. That work wall slams them in the face and that fire in their belly quickly gets put out. Even a one stage demo was simply too much a couple years back if you recall.
It's a cool idea, but finding a group of people who are going to have the time and drive to finish it is by far the hardest part.