If it's the Multiverse, then anyone can play anybody and anything can happen because even if something is canon in one 'verse it's not canon in a different one.
You do realize that Robert Downey Jr. coming back to the MCU is not a bad thing and at the same time you can bring him back to play something else because in reality if you actually read comic books, there is a comic book out there where Dr. Dommm and Iron Man switch bodies and he becomes Dr. Doug read that comic book. You’ll understand why he’s coming back to the MCU.
If it's the Multiverse, then anyone can play anybody and anything can happen because even if something is canon in one 'verse it's not canon in a different one.
You do realize that Robert Downey Jr. coming back to the MCU is not a bad thing and at the same time you can bring him back to play something else because in reality if you actually read comic books, there is a comic book out there where Dr. Dommm and Iron Man switch bodies and he becomes Dr. Doug read that comic book. You’ll understand why he’s coming back to the MCU.