Endgame - The main thing is that I liked it, which is shocking when you consider Infinity War, which was filmed at basically the same time as this by the same cast and crew, was damn near unwatchable. The huge difference being one of structure; namely, Endgame actually has one, or at least the semblance of one compared to the sludgy endless pointless Middle that was IW.
The first act capitalizes on a rare storytelling opportunity; our heroes straight up lost, and they gotta hold that shit. There's some great surprises in seeing how everyone has changed and their reaction to dealing with failure. This is probably the strongest material for the actors, who have become quite attuned to the rhythms of their particular characters.
The middle takes the form of an anniversary issue, like Avengers #1000, a celebration of the Marvel Cinematic Universe using the light framework of a cosmic heist. Outside a couple of heroic sacrifices or setbacks, this is all refreshingly lowkey. Its a testament to how attached the audience has become to these characters that this works so well. The Thanos snap was a blessing in this regard; the lowered body count helps keeps the bulk of the movie clear and focused, which I could never accuse Infinity War of being.
The third act is, of course, the Big Climax, with armies of CGI things and lasers and cool shit. This one works about as well as any of them tho, rivaling even the Battle of New York in the original Avengers. For one, the movie has been shockingly restrained when it comes to giant spectacle for most of the film, so the size and scope of the final battle actually feels like a climax and not just another in a near-ending battle. Its also where all the big crowdpleasing moments drop, one by one, including TWO big Captain America moments I've waited damn near a decade for. Like the best superhero team books, its clever in its application of the individual hero' powersets, creating visually unique actions as the battle rages on.
The main mark of success of Endgame is the sense of finality. Sure, they'll be more movies, but like the end of a certain comic book run by a favorite writer, it feels like the closing of a book and the end of a long journey. Love 'em or hate 'em, the Marvel superhero films have meant a great deal for an entire generation of fans, and have had an influence and impact on Hollywood in a way very few franchises have ever done. Endgame rewards our collective fandom with one last big show and a grateful bow towards the audience.