Marvel Rewatch for Doomsday - Avengers: Endgame (2019)
DoomsdayRewatchMarvelMCUAvengers

Obviously one of the high points of the whole MCU. There's really three parts to this movie. The first is headed by Ant-Man and the realisation that they might be able to do something. The second is the time heist where everybody gets their moment. The third is the final battle where Thanos is finally defeated. The final battle makes less sense after repeated watching but it's still epic in scale.
Paddy
