Board Thread:General Discussion/@comment-30536711-20160429041114

I've read through a few articles about which characters that won't be showing up in the MCU, and the common reason is due their connection to said character or team that a company like Fox owns the film rights to. For example we probably won't be seeing Annihilus or the Negative Zone due their connections to Fantastic Four. But some characters and alien races that are currently in the MCU had their debut in an FF comic or have appeared multiple times in FF stories such as the Kree, Inhumans, and the Black Panther. How did Marvel manage to hold on their rights rather than Fox, and what exactly decides how one property belongs to another studio? 