50. Captain America: The First Avenger (2011)
The Deleted Scene: As Leia tends to Luke in the medical centre, the boy wonder openly laments how he might never get the chance to tell Leia how he feels. A kiss looks imminent before those bungling droids show up to ruin it.
If They Had Left It In: It would have helped flesh out the HYDRA story arc, as Bucky gets kidnapped by the organisation shortly after this scene.
For more great deleted scenes, including footage shorn from Star Wars, Harry Potter, The Dark Knight and more, follow this link.