There's still the possibility of a reboot of the MCU (I've made peace with the idea of "the story of Spiderman" being retold periodically the way we keep remaking Romeo and Juliet, but rebooting the entire MCU seems different) or "I'm Tony B Stark from another reality, I'm technically not a reboot and look slightly different but I'm basically the same character."
There's also the question of where imitators fall; is Kate Bishop just a reboot of Hawkeye?
There's also the question of where imitators fall; is Kate Bishop just a reboot of Hawkeye?