So it would be a bit like a project management too, but specifically designed for games. You would create tasks that need to be accomplish and assign them to team members, but it would have a different calendar display, and it would have features that allow you to "force" the game to be one by certain deadline. Of course it can't *literally* force you ... it just "makes a big deal" out of getting it done on time, even if it's not quite what you imagined.
It would be quite a lot simpler than a regular project management tool, and it would have a UI that would be a lot more fun to use.
Does that help?