Kathryn Newton Joins Ant-Man 3, Officially Subtitled Quantumania! It’s been a few months since we last heard word that Lovecraft Country star Jonathan Majors had joined the cast as the central villain and now Kevin Feige has revealed that the highly-anticipated third Ant-Man and the Wasp film is expanding its cast with the addition of Freaky lead Kathryn Newton, as well as confirming the film’s official subtitle as Quantumania!