After Darren Cross (Corey Stoll) takes over his former mentor Pym's business, he produces a similar suit to be worn by the military as well as a more powerful version for himself, transforming him into Yellowjacket. This results in chaos and it's up to Ant-Man to use both his thieving skills and his new-found abilities to prevent Pym's technology from falling into the wrong hands. In the sequel 'Ant-Man and the Wasp' (2018), set after the events of 'Captain America: Civil War' (2016), Scott is placed under house arrest and is attempting to balance his family life with his responsibilities as Ant-Man.

After being approached by Hope - now also known as the Wasp - and her father Hank Pym with a new mission, Lang must put his personal struggles to one side as he teams up with the Wasp in a bid to uncover some dark secrets from the past. Finally, in 'Ant-Man and the Wasp: Quantumania' (2023) Scott and his daughter Cassie (Kathryn Newton) find themselves transported to the Quantum Realm along with Hope, Hank Pym and Janet Van Dyne (Michelle Pfeiffer), where they come up against Kang the Conqueror (Jonathan Majors). As Scott mourns the time he lost with Cassie and Janet is forced to confront her trauma from decades spent trapped in the Quantum Realm, can they thwart Kang's plans?