Marvel Studios released the first official trailer on its X account, positioning the series as a four-episode animated event. The show carries a TV-MA rating, signaling a darker, more graphic tone than prior Marvel animation. The voice cast features MCU stars including Florence Pugh, Hailee Steinfeld, Elizabeth Olsen, Simu Liu, Iman Vellani and David Harbour, with Paul Rudd also named. The story expands the What If…? Zombies premise into a post‑apocalyptic survival saga driven by a viral outbreak affecting heroes and villains. Marvel has not confirmed whether episodes will drop all at once or weekly, nor any connections to Avengers: Doomsday or additional seasons.