Characters include the Avengers we already know: Iron Man, Captain America, Ant Man, Spider-Man, Black Panther, Black Widow, Thor, Hawkeye, Hulk, Dr. Strange (all of whom except Black Widow and Hawkeye have had their own movies), plus the secondary characters like Pepper Potts, Happy Hogan, and Heimdal and a few who are sometimes on our side, sometimes against us characters: Loki, Scarlet Witch, Bucky (glimpsed at the end of “Black Panther”), War Machine, Jarvis, Nebula, plus the “Guardians of the Galaxy” group, including Star Lord/Peter, Gamora, Drax, Groot, and Rocky Racoon.

The bad guy is Thanos, played by Josh Brolin, who basically wants to control or destroy everyone and everything. For that he needs all of the infinity stones, some of which we have already seen. Nerdist has a great, detailed breakdown of the stones and their history and powers.

Basically, all you need to know is that the bad guy is going to destroy everything and the good guys in various quippy combinations, are going to do their best to stop him, and if they can’t, of course they will AVENGE!