I think it’s actually pretty normal for movies to start filming or get close to finishing without a complete script. Hayao Miyazaki famously doesn’t write dialogue until the movie is already partially animated from storyboards. Francis Ford Coppola also sometimes wouldn’t write dialogue and would have the actors improvise on set. Other movies I can think of that didn’t have a script while filming: Jaws, Jurassic Park 3, Casablanca, at least a few of the Alien movies, one of the Hellraisers, most of the Star Wars films if Lucas was involved. With Star Wars in particular it seems like the movie’s actual plot isn’t figured out until editing.
But in those cases I think it’s creative or production related decisions. In Marvel’s case I can fully believe they have no idea what they’re doing or why. It’s just a vehicle to sell things or make something to go on Disney+.
I think it’s actually pretty normal for movies to start filming or get close to finishing without a complete script. Hayao Miyazaki famously doesn’t write dialogue until the movie is already partially animated from storyboards. Francis Ford Coppola also sometimes wouldn’t write dialogue and would have the actors improvise on set. Other movies I can think of that didn’t have a script while filming: Jaws, Jurassic Park 3, Casablanca, at least a few of the Alien movies, one of the Hellraisers, most of the Star Wars films if Lucas was involved. With Star Wars in particular it seems like the movie’s actual plot isn’t figured out until editing.
But in those cases I think it’s creative or production related decisions. In Marvel’s case I can fully believe they have no idea what they’re doing or why. It’s just a vehicle to sell things or make something to go on Disney+.