I wonder if Disney is going to reboot the whole MCU at some point and start from the beginning with new Iron Man and Thor origin films, or will they continue the cinematic canon and just continue to move forward recasting the roles?
Anything is possible but they've strongly implied that they're going to treat the MCU like the pre-Casino Royale Bond series. They've got their origins and will henceforth be ever young characters who will be recast every 10 years or so.