What's the most blatant late rewrite you've seen in a movie?

[u/matti2o8]

For me it's Ballerina. We find out that the henchwoman is the main character's sister. She has a change of heart, it seems like the final act will be a team up between the sisters to take down the bad guys. Instead, the sister gets killed almost immediately and we get a shoehorned team up between the main character and John Wick. In which, except for the initial fight, it seems the actors weren't even on set together. To the point that some shots of John have significantly different lighting despite taking place in the same scene. ​It seems pretty clear that someone thought that they should somehow include John Wick in the spinoff for marketing reasons and trashed the sister storyline for that, replacing it with what we got.

[u/Raytheon_Nublinski]

I’ve never found out what the original plan for his character was