A new rumour claims to reveal whether Avengers: Doomsday's Doctor Doom hails from Earth-828, the reality inhabited by Marvel's First Family in The Fantastic Four: First Steps. Read on for details ...

Rumors about Avengers: Doomsday have been swirling for months, and the credits scene of The Fantastic Four: First Steps seems to confirm some of them.

Robert Downey, Jr. has posted a cryptic new teaser on Instagram, one that seems to offer some important new insight into the plot of Avengers: Doomsday.

"The Fantastic Four: First Steps" brings a new supergroup into the MCU while a post-credits scene gives a taste of an iconic supervillain. Spoilers!

"Fantastic Four: First Steps" has a thrilling ending that teases Dr. Doom and where the MCU goes from here in "Avengers: Doomsday." ...

Doctor Doom finally making an appearance in a Marvel film isn’t that surprising given that he will be the main “Big Bad” for this phase of the MCU and that he is one of the Fantastic Four ...

Latveria is the fictional homeland of Doctor Doom, the Fantastic Four’s nemesis who will be played by Robert Downey Jr. in “Avengers: Doomsday.” A quick scene in “First Steps” shows ...

The Fantastic Four: First Steps established that Latveria exists on Earth-828. That doesn’t mean the version of Doctor Doom seen at the end of the film* is from that dimension, though. Pedro ...

So, this ending/post-credits scene suggests that Doctor Doom — who will be played by Robert Downey Jr. — will come from Earth 828, and perhaps, the Fantastic Four will have to chase him all ...

What Does Doctor Doom Want With Franklin Richards? First Steps is a mostly standalone film, but let’s not discount the big Doom scene.

And it’s awesome. A nice way to send us out. Did you think the Fantastic Four end credits scene was a fitting tease? What does Doctor Doom want with Franklin? Let us know below. Want more io9 news?