Avengers: Doomsday Rumors vs. Reality - Which Marvel Fights Are Happening and WHO is in the movie?

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Avengers: Doomsday might be Marvel’s biggest crossover yet—but at this point, separating what’s REAL from what’s RUMORED is becoming a full-time job.

In this Nerd Alert discussion, we dig into the latest Avengers: Doomsday rumors, leaks, reports, and confirmed information surrounding the massive MCU event.

Who is actually fighting whom?

We break down the supposedly “confirmed” battles making their way around the internet and ask the important question: How much of this can we actually believe?

With Doctor Doom, the Avengers, X-Men, Fantastic Four, New Avengers, Wakandans, and characters from across the Multiverse all potentially colliding, there are almost endless possibilities for Marvel to deliver matchups fans have been waiting years to see.

But there’s a big difference between something being officially confirmed by Marvel, shown in footage, reported by an insider, leaked online, or simply repeated enough times that everyone starts treating it like fact.

So we’re sorting through the chaos.

What Avengers: Doomsday fights do we think are really happening? Which rumors sound believable? Which ones are we skeptical about? And which Marvel matchups would we LOVE to see when Doomsday finally arrives?

Avengers: Doomsday hits theaters December 18, 2026.

Let us know in the comments: What fight MUST happen in Avengers: Doomsday?