One forum idea I had was a sort of marine paleobiology forum. People can get marine fossils identified and discuss stuff like depositional environments and fossils of shallow seas and deep seas. Another one I had would be Cretaceous North American Dinosaurs, like stuff from the Hell Creek Formation.
Both sound wonderful! Marine paleobiology is so interesting – plus it has a higher preservation potential – so I feel like that could spark a lot of good conversations. Also, a forum on dinosaurs themselves would be interesting, and perhaps we could do a thread specifically on Hell Creek or Cretaceous North American dinosaurs.