The 5 year thing is the biggest head scratcher
The only thing more destructive than half of all peopel instantly disappearing would be half of all people magically reappearing 5 years later
Plus... you have Spider-Man's cast to be confused about but also some place like Wakanda (do they just give back the throne instantly? what happened those 5 years world wide?). Or earth being without a sorcerer supreme for 5 years.
Probably should have went the Secret Wars route where the surivors rmember but everything is reset but I understand needing that to make the stakes for IM highe rbut... its odd