Kathryn Newton makes her debut as Scott Lang's daughter, Cassie Lang, replacing Emma Fuhrmann.
In the top image: Kathryn Newton as Cassie and Paul Rudd as Scott in "Ant-Man and the Wasp: Quantumania." In the bottom image: Rudd as Scott and Emma Fuhrmann as Cassie in "Avengers: Endgame." Marvel Studios; Marvel Studios
Cassie was last seen reuniting with Scott (Paul Rudd) in "Avengers: Endgame," played by Fuhrmann. It's unclear why the role was recast, but Fuhrmann spoke out about the change on Twitter in December 2020, saying that she "will always be grateful to have been a part of the MCU."
In "Quantumania," Cassie will don her very own superhero suit, as seen in the trailer.
Different footage was shown at San Diego Comic-Con in July, revealing that Cassie ends up in jail after getting into some kind of trouble.
At SDCC, Newton said that the movie picks up with Cassie "all grown up."
"She's been without a dad because of the Blip for five years and she thinks she knows who she is," Newton told Deadline. "She's got a lot of love in her heart, and she's going after what she thinks is good. But she's making a lot of mistakes, as you do. But she's becoming who she is in this movie."
In a callback to the first "Ant-Man" movie, Scott is seen at Baskin Robbins with his manager, Dale.
Dale and Scott Lang in "Ant-Man and the Wasp: Quantumania" and "Ant-Man." Marvel Studios
After getting released from prison and finding it difficult to get hired due to his criminal record in "Ant-Man," Scott landed a job at the ice cream chain. He got fired shortly after due to Dale (played by Gregg Turkington) finding out about his crimes.
In the trailer for "Quantumania," Scott, dressed as Ant-Man, shakes hands with Dale in front of a plaque honoring him as "employee of the century."
The trailer gives fans a first look at Bill Murray's mystery character.
Bill Murray in the first trailer for "Ant-Man and the Wasp: Quantumania." Marvel Studios
Murray only appears in one quick scene in the trailer, wearing some kind of blue suit with a white collar and gold accents. According to some outlets, he's rumored to be starring as Krylar, a lesser-known character from the comics, but it hasn't been confirmed.
Kang the Conqueror, played by Jonathan Majors, has a comic-book-accurate costume and appearance.
On the left: Jonathan Majors as Kang in "Ant-Man and the Wasp: Quantumania." On the right: Kang in the comics. Marvel Studios; Marvel Comics
Majors made his MCU debut as a Kang variant referred to as He Who Remains in season one of "Loki," released in 2021.
In the "Quantumania" trailer, Kang is seen wearing an outfit similar to the source material. Like the comics, he also has vertical scars on his face.
Majors is already confirmed to be heavily involved in the future of the MCU, specifically the Multiverse Saga. So, it's fitting that he'll be at the center of "Quantumania," which marks the beginning of Phase 5.
At Disney's D23 Expo in Anaheim, California in September, Marvel Studios president Kevin Feige confirmed that the third "Ant-Man" movie "goes right into" the fifth "Avengers" movie, titled "Avengers: The Kang Dynasty."
The official poster appears to be an homage to Steven Spielberg's 1987 sci-fi movie "Innerspace."
On the left: The poster for "Ant-Man and the Wasp: Quantumania." On the right: The poster for "Innerspace." Marvel Studios; Warner Bros.
Spielberg's movie centered on a test pilot named Tuck Pendleton (played by Dennis Quaid) who became miniaturized during an experiment. The film costarred Martin Short and Meg Ryan.
The latest poster for "Quantumania," showing Kang's hand holding the miniaturized versions of Ant-Man and the Wasp (Evangeline Lilly), looks similar to the artwork for "Innerspace."