Brainstorm Stack Exchange would be a website where you post your idea, and see what people think of it. Whether it is a game project idea, a story idea, or anything else, as long as it is an idea.
This idea will most likely be closed as it doesn't fit the Stack Exchange format. At Stack Exchange we expect to have a community on a specific subject space that is based on facts and not opinions.
This site idea will mostly generate a lot of discussions and polling which we don't do on SE.
Remember: We are not a discussion forum.