Sequels where the main character gets a new trait, but "it's always been there"
Watching Aliens again last night had me thinking of Back to the Future II, and how everyone starts reminding Marty of his biggest character flaw- how impulsive he gets when someone calls him a chicken. This character trait determines the majority of decisions Marty ever makes.
He has always had this flaw- YES, DURING THE FIRST MOVIE, but it just never came up in the first one, but it will come up at least once every 25 minutes for the rest of the trilogy.
I love BTTF, but "chicken" always seems bolted on in pt 2 to me.
You remember in Alien how "Ellen" was constantly talking about her daughter and her promise to get back before her 11th birthday? Man, she wouldn't shut up about it.
Offscreen.
But her failure to keep a promise to her daughter, and the guilt and pain that goes along with that, determines the majority of the decisions this character will make (in 1 sequel (and only the extended cut)).
But I was thinking- it's far more successful (for me) in Aliens than in BTTF. It doesn't feel lazily and improperly attached so the character can overcome something in the third act- I think that though it becomes her dominant motivation in Aliens, that it blends well with her other character traits.
What other sequels try to back door character traits into the main characters, and then pretend they were always there?
Some superhero movies have:
Movie 1: Normie wants to be a hero, and succeeds
Movie 2: Hero wants to be normal, to be with the girl. Temporarily succeeds, but destiny (the villain) calls and they lose the girl and hero up again.
Movie 3: (extra credit) black goo turns them evil for part of the movie, but they eventually overcome it, fight (literally) the dark version of themselves, and win.
This isn't quite the same as "remember that temper of mine that almost completely undermines all of my positive traits", but I think it comes from a similar place- Movie 1 completed their character arch, and if Movie 2 hopes to do anything interesting with that character- they need something new to define them.