A deleted scene from Thor: The Dark World almost altered the trajectory of the MCU series. The Dark World notably features the death of Frigga – Queen of Asgard and Thor and Lokis mother – in the MCU timeline. After Thor brought Jane to Asgard to protect her from the powers of the Aether inside of her, Frigga defended her against the Dark Elves. However, Frigga died protecting Jane as neither Thor nor Odin could get to them in time. Her death was a pivotal moment for many characters in the franchise, though it couldve almost gone quite differently.

https://screenrant.com/thor-dark-world-deleted-scene-hela-mcu-movie-villain-ruined-almost/