User blog comment:Mr. Xemnas/Fin Fang Foom for Iron man 4 WHO'S WITH ME!!/@comment-5364175-20130224165334/@comment-4651179-20130224174815

Nah, the MCU is just getting started. The only thing people talk is about possibilities for new movies, Black Panther, Planet Hulk, I don't see people will get tired of it.

We will never know which actors will get tired or if they will get tired of playing comicbook characters. Many of them love to play their respective characters, like RDJ, Tom Hiddlestone and Chris Evans. And there's always the option of recasting, even if it ain't the better thing to do, I personally hate recasting.