This was certainly the case for David Ayer’s Suicide Squad, which went through massive reshoots reportedly due to pressure from the studio.
Because an unseen clip from Suicide Squad just revealed that Jay Hernandez’ tragic character Diablo originally survived the final conflict with Incubus and Enchantress.
Characters like Jared Leto’s Joker were very cut down when it arrived in theaters, and he’s not the only one to suffer this fate.
As such, the genre is constantly in flux, with directors filming tons of extra scenes, and making liberal changes to each cut before the theatrical release.