The one that started it all, forever honored

Nope, didn't want to watch a "performer" who promotes the pedo lifestyle

He will probably stick around long enough to launch the MCU X-Men films which would bring things full circle for him since he started out in the first X-Men film.

Wall-E

Disney is probably in panic mode over the performances of their recent efforts and don't want anything taint the marketing for the new Avengers film. So, they want to bury Wonder Man in case it wasn't well received. Sucks, but that's how they roll when in doubt.