If you're still reading this I seriously hope you've already seen Avengers: Endgame because I'm about to spoil one of movie's biggest moments: Tony Stark dies. Save for the build-a-figure of Thanos you get for completing the entire wave, literally only two of the figures in this Endgame wave are actually from Endgame: Ronin, Hawkeye's new identity for a period avengers endgame final scene of the film, and Captain America, once again in that spacesuit.
My darling favorite, he's always been primed to wind up on the chopping block, and each film that doesn't end with him meeting his fate has been a blessing (except for Civil War, which was a terrible movie and Marvel should go home). As everybody expected, all of the superheroes who were dusted at the end of Infinity War return to do battle against a time-travelling Thanos five years after the events of the first film.
After equipping the Infinity Gauntlet onto his left arm, combined with his already extraordinary physical constitution and raw power, Thanos is granted the potential to safely harness the supernatural powers of all the six Infinity Stones should he add them to the Gauntlet.
Endgame sweeps us up more or less from the point at which Infinity War set us down. It's a blink-and-you'll-miss-it cameo, but that character is actually Harley Keener, played by Ty Simpkins, the gadget-loving wunderkind who helped Tony out of a jam in Iron Man 3.
The real focus here is six longtime friends (though there are about a hundred named characters that flit on and off-screen from different eras of the MCU) and their evolving relationships with one another. As the Ancient One explains to the Hulk, those alternate timelines rely on the presence of the Infinity Stones to save themselves from certain peril.
With all the heroes working together, Thanos was trapped while Iron Man and Spider-Man worked together to take the Gauntlet, with Thanos using all his might in his attempts to break himself free from their hold. There will be more Marvel movies. It's cool to see Cobie play the strong character Maria Hill in many of the Marvel movies, and it's equally awesome to see her with her cute daughters.