I'm not sure if this would be of interest to anyone here, but a friend and I are starting a forum-based roleplay starring Superman and Batman. It's loosely based on the animated universe. To be clear, this is a PG-13 roleplay. It is basically just collaborative and fairly casual collaborative storytelling on a forum. Feel free to join, and you can PM me questions if needed.

https://superman.nfshost.com/forums/index.php?topic=21.msg31