Why Stephen McFeely Is the Ultimate Savior for Avengers: Doomsday and the MCU Multiverse Saga

I’ll admit it upfront: I’ve been burned by Marvel news before. I got excited about the Kang saga, watched it collapse in slow motion, and told myself I wouldn’t get my hopes up again. Then Kevin Feige dropped the announcement that Anthony and Joe Russo were coming back, that Robert Downey Jr. was somehow returning as Victor von Doom, and that Stephen McFeely was writing the script — and I felt that old, dumb, giddy hope creep back in anyway.

If you’ve spent any real time in Marvel forums or comment sections over the last few months, you already know McFeely’s name carries a different kind of weight than most screenwriters get. He’s not a hype-man hire. He’s the guy who, alongside his longtime partner Christopher Markus, wrote Captain America: The Winter Soldier, Captain America: Civil War, Avengers: Infinity War, and Avengers: Endgame — which is, not coincidentally, most people’s list of the best things the MCU has ever produced. So when his name showed up attached to Doomsday, it didn’t just feel like a good hire. It felt like Marvel finally admitting it needed its A-team back.

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He Said No First — And That’s What Makes This Interesting

Here’s the detail that stuck with me: McFeely didn’t jump at this. According to recent reporting, he actually turned it down initially, and not in a soft, ‘let me think about it’ way — he flat-out believed Endgame was supposed to be the last word on his Avengers story. That’s a writer who isn’t chasing a paycheck or a franchise credit. He’d said his goodbye already.

What pulled him back in was apparently a specific narrative idea — something that let the multiverse chaos of this era actually connect rather than just sprawl outward the way multiverse stories so often do. When he brought that pitch to the Russos, it reportedly became the exact thing that convinced them to climb back into the director’s chair. That’s not a small detail for fans like me who’ve watched multiverse storytelling get messier and messier since Endgame opened that door. A structural idea good enough to lure back the writer and the directors who defined the last golden era of this franchise? That’s worth paying attention to.

The Markus-Sized Hole in the Room

I won’t pretend this doesn’t worry me a little. Markus and McFeely wrote as a pair for over twenty years. Splitting them up for the biggest crossover event since Endgame is a genuine gamble. Markus has explained his absence comes down to his commitments running AGBO, the Russos’ own studio — apparently a Marvel script isn’t something you write on the side while running a production company, which, fair enough.

So McFeely is doing this one solo. But ‘solo’ doesn’t mean unsupported. The writers’ room reportedly includes:

• Michael Waldron — the guy behind Loki and Doctor Strange in the Multiverse of Madness, brought in largely to keep the multiverse mechanics internally consistent.
• Chris McKenna and Erik Sommers — the pair who wrote Tom Holland’s entire Spider-Man trilogy, presumably there to keep the character voices sharp and the dialogue from getting bogged down in exposition.

Feige has framed this as McFeely steering the ship while a small crew of MCU veterans helps polish the hull. As someone who’s sat through plenty of multiverse plots that collapsed under their own rules, I actually find that reassuring rather than diluting.

Filming Without a Finished Script? Sure, Why Not

This is the part of the story that made me raise an eyebrow. The Russos told the Associated Press that principal photography on Doomsday started before the script was fully locked. In an industry where a finished screenplay is usually treated as sacred before a single camera rolls, that’s a bold — maybe reckless — choice.

Their justification is that the script is being treated as something alive, shaped in the room through rehearsal and improvisation rather than locked months in advance. It’s the same rough philosophy that supposedly shaped Infinity War and Endgame, and given how those two turned out, I’m inclined to give it the benefit of the doubt. It also explains the extreme secrecy on set — green screens, face-replacement work, script pages kept under lock and key — because apparently even the actors aren’t getting the full picture until they need it.

What’s Actually Colliding in This Movie

Here’s where the scale gets genuinely wild. The story reportedly picks up about fourteen months after Thunderbolts, centered on realities that are actively falling apart. Three separate cinematic universes are on a crash course:

Juggling that many heroes without turning the movie into a glorified cameo reel is exactly the kind of problem McFeely has solved before. Civil War somehow gave a dozen characters real emotional stakes in one film. Infinity War did it with double that cast and still landed a gut-punch ending. If anyone’s earned the benefit of the doubt on ensemble math, it’s him.

And Then There’s Doom

Let’s talk about the elephant in the room: Robert Downey Jr. playing Doctor Doom. I’ve seen every theory under the sun — a corrupted Stark variant who becomes Doom, a completely separate Victor von Doom who happens to share Downey’s face, something stranger involving the multiverse itself. What I keep coming back to is the reported tonal shift: word is McFeely’s script is leaning darker and more somber specifically to keep this version of Downey as far from ‘charismatic billionaire genius’ as possible. Given how tightly Iron Man is stitched into a decade of audience goodwill, that’s a genuinely difficult tightrope to walk, and it’s arguably the single biggest test of whether this script actually works.

Why I’m Cautiously, Stubbornly Optimistic

With Alan Silvestri back on the score and editor Jeffrey Ford cutting the film, the whole production has that unmistakable Phase Three fingerprint again. Early buzz out of Disney is apparently confident, with comparisons already being drawn to the sheer weight of Infinity War‘s cliffhanger structure.

I know hype cycles like this have burned fans before — myself included. But there’s something different about watching Marvel go back to the exact writer who closed out its best era, hand him a near-impossible task, and trust him to figure it out without his usual co-pilot. Whether Avengers: Doomsday actually lands in December 2026 the way Endgame did in 2019 is anyone’s guess. But if there’s one person with a track record of making impossible ensemble math feel personal, it’s Stephen McFeely — and that alone is enough to get me back in a theater seat opening night.