I cannot be objective about this movie. At all. You get laughs, tears, the whole gamut of emotions. The screenwriters and directors manage to pay off every movie from the MCU. Every Movie. Even Thor: Dark World.
I cannot go into the opening scene. It is emotionally devastating. It is a gut punch to remind you people missing and what the remaining people are going through.
Spoilers – no Spoliers. The Avengers track down Thanos after the Snap. It does not go as well as they plan. Then we get a significant time jump. We see how the world has progressed in 5 years with half the population gone.
Ant-Man plays pretty heavily into the plot of Endgame. The Avengers prepare a Heist of epic proportions to gather the stones to undo the Snap. But like all plans, it does not survive contact with the enemy.
Along the way we get to revisit moments from all the previous MCU movies. So much character development. Every character gets their moment to shine in one way or another.
Phase 4 and Beyond are setup. But this could easily be the last MCU movie and tie everything up nicely.
I do not have just one favorite or stand out moment from the movie. But several. A lot from the final reel.
Two quotes to highlight a couple:
Thor -> “…I Knew It!”
Spider-Man -> “…Instant-Kill…”
Starring: Anyone and Everyone from previous MCU movies.