The original ending for Sam Raimi's Spider-Man 3, which focused on Bryce Dallas Howard's Gwen Stacy, would have completely ruined the film's climactic moments. Released in 2007 and set a year after the events of Spider-Man 2, Spider-Man 3 follows Peter Parker (Tobey Maguire) as he continues to navigate his double life as a college student and a superhero. He is also forced to fight against three new villains: his uncle's killer, Flint Marko/Sandman (Thomas Haden Church); his rival co-worker, Eddie Brock/Venom (Topher Grace); and his former best friend, Harry Osborn/Green Goblin (James Franco).
https://screenrant.com/spiderman-3-gwen-stacy-original-ending-movie-ruin/