Janet van Dyne is selected as a member of the Mighty Avengers by Carol Danvers and Tony Stark as part of the Fifty State Initiative. During its attempt to destroy humanity, she correctly determines that Ultron has taken over Iron Man's body. When alien symbiotes attack New York, Janet uses a refined growth formula given to her by Hank Pym—who is actually a Skrull impostor—which allows her to shift to giant-size without side effects. During the beginning of the fight, she is briefly turned into a symbiote monster before a cure is created by Stark.