I would like to make a general note that anyone posting with the request of a forum should have something more than a great idea to back up their request.
You should, at least, have a story summary ready. Also, any images, video, etc. would help you out a bunch.
Remember, the In Production forums aren't just for all films, but for the ones that are fun to watch being made. Some films that turn out great would be dull to watch, so realize that when requesting.
Basically, if your film offers cool behind the scenes stuff or community participation, that would make it a great cantidate for a forum.
I'm not trying to discourage you from requesting, though