I have a specialized class on intellectual property this semester (on Patent and Trademarks, Copyrights is next semester). Only had a quick overview of that in previous business law classes. I'll be able to help more people here when it comes to knowing what to do and your rights for intellectual property!
I've reconsidered having a subclass system for my first two games since there will already be plenty of variation in playable actors and usable items in the games. The third game will need it because of the basis for the story but I want the actors in the first two to be more focused in their roles.