The "bad guy" wants to save everybody
and the "good guy" kills him
shareI was honestly rooting for the older Buzz.
He was going to save everyone from being marooned in that planet for several lifetimes.
Changing the past where someone might not be born is not killing them. I don’t know why this movie made it seem that way.
The plot is truly bizarre. Are we really meant to believe after years of trying to get everyone home Buzz would let his friends and colleagues waste their lives on a faraway planet and die without ever seeing their families on Earth again because of a girl he's known for a couple of days? And Old Buzz is supposed to be the "bad guy" for not giving up and still trying to complete the mission?
If old Buzz succeeds Izzy isn't born, but Alisha returns to Earth and probably goes on to have a happy life, kids and grandchildren with someone else instead, not to mention the rest of the crew which Buzz seemingly doesn't give a second thought to.
No wonder the film did relatively poorly by Pixar standards, they took a heroic character and made him into a selfish jerk.