Avengers: Doomsday ScreenX Trailer Hints at Kate Bishop's Big-Screen MCU Return

Sometimes the biggest reveals hide in the smallest moments. The expanded ScreenX view of the Avengers: Doomsday trailer reveals Scott Lang embracing his daughter Cassie while standing inside Kate Bishop's apartment — a detail that strongly suggests Hailee Steinfeld's Kate Bishop is making her big-screen return, according to reports.

It would be a significant homecoming. Kate Bishop headlined the Hawkeye Disney+ series in 2021, winning over audiences as the bow-wielding protégé of Clint Barton, and she made a brief appearance in The Marvels. But she hasn't had a major role since, and fans have been waiting — some would say impatiently — for her next move in the MCU.

Reading the Tea Leaves

The evidence is circumstantial but tantalizing. Why stage an emotional father-daughter moment in Kate Bishop's apartment unless Kate herself is part of the picture? ScreenX fanned the flames further, posting the trailer on X with the message, "The countdown has begun to Doomsday in SCREENX" — though the return has not been officially confirmed by Marvel Studios, and the studio is famously allergic to confirming anything ahead of schedule.

Fans, naturally, have taken the hint and run with it. Speculation is also swirling about other unannounced returns, including Wanda Maximoff and Tobey Maguire's Spider-Man — the kind of wish-list casting that accompanies every Avengers event film and occasionally turns out to be true.

The Young Avengers Era

What makes the Kate Bishop theory particularly compelling is how neatly it fits the MCU's current trajectory. Her return would align with the franchise's shift toward a younger cast of heroes, with Cassie Lang, Kate Bishop, and the next generation increasingly positioned as the future of the saga.

Avengers: Doomsday is shaping up to be one of Marvel's most secretive projects, with marketing keeping many plot details under wraps. Whether Kate Bishop is officially in the film or this is just a very suggestive set-dressing choice, the ScreenX trailer has given fans exactly what they wanted: something new to argue about until December 18, 2026.

Why the Theory Holds Water

Marvel's marketing team doesn't do accidents, which is why this particular frame has the fandom in overdrive. Set dressers don't casually place an emotional family reunion inside a specific character's apartment without intent — every location in a trailer this tightly controlled is a choice. And the choice of Kate Bishop's apartment, rather than any anonymous interior, reads as deliberate. Consider the broader context: the MCU has been steadily assembling its next generation, and Kate Bishop — introduced to widespread acclaim in the 2021 Hawkeye series — is arguably the most popular of the young heroes still waiting for a defining big-screen moment. Her brief appearance in The Marvels felt like a promise of more to come. Pairing her space with the Lang family, another cornerstone of the franchise's younger bench, only strengthens the read that Doomsday will be as much about succession as survival. Marvel Studios hasn't confirmed anything, and it won't — secrecy is the whole brand at this point. But if the studio wanted to kill the theory, it had every opportunity to choose a different apartment. It didn't.