I haven't watched Lightyear yet, and maybe there's some kind of bait and switch going on, but from what I understand of the marketing materials, the premise is just fucking bizarre.
Retroactively, we're meant to believe that Buzz Lightyear from Toy Story wasn't just a toy line, the titular character was in fact based on a real world astronaut. But not an astronaut as we currently know them, but more of a deep space adventurer right out of sci-fi pulp.
So...? The Toy Story movies actually take place in the future? Even though there's never been anything to indicate as much? Just the opposite, in fact.
They could have made this setup work with Woody -- in that he could have been a real life folk hero from the Old West or some shit. Of course, Disney's probably pretty gun shy about making Westerns these days.
If they had instead done Toy Story 5 or whatever, would it have made more money? I mean, probably? I guess not many people were interested in a spin-off where one of the toys is now a real man.
Some people are blaming the swap from Tim Allen to Chris Evans, but I say fuck that. Nobody gives a fuck about Tim Allen anymore.