The rules will be pretty simple. Since this is a new group, you can post as much art as you want, at least for now. All art of course has to be about the Baroness. No art that doesn't have her will be allowed, which I think that would already be clear. You can do art with other Cobra members or even the GI. Joes or whoever, as long as the Baroness is in the art with them.
I created the group cause the Baroness is my favorite Cobra character, and I wanted to give her her own fan group.