Since the main actors/actresses of MCU will not be forever.
How would you like to end MCU as epilogue?
Here's mine as time-skip after battle with Thanos:
- Stan Lee as the Watcher giving his eyes to Nick Fury
- Steve Roger as SHIELD/SWORD commander then grow old (super-soldier serum wear out)
- Thor as king of Asgard, hold one of the infinity stones
- Vision, since Thanos get the stone he's already dead
- Hulk as King Maestro in Planet Hulk
- Tony Stark, governor of futuristic city
- T'Challa, together with his white-haired wife
- Bucky, still frozen
- GOTG, retired, hold one of the infinity stones
- Dr. Strange, retired, hold one of the infinity stones
... the rest will just retired, perhaps have a family