Dedicated Marvel fans will spot a Doctor Doom Easter egg in The Fantastic Four: First Steps during a scene at the United Nations.

So yes, Doctor Doom does appear in First Steps. In the mid-credits scene, we jump four years into the future and see Sue Storm and her son Franklin reading together in their home in the Baxter Building.

There have been strong rumours online suggesting that any post-credits scene could see former Iron Man star Robert Downey Jr appear as Doctor Doom for the first time, not an especially far-fetched idea given he's currently filming for his part in Avengers: Doomsday and the character is the Fantastic Four's most famous foe.

First Step’s post-credit scene leaves fans buzzing with new Doctor Doom theories, hinting at what could be next for Marvel’s iconic villain

So does RDJ’s Doctor Doom pop up in the new Fantastic Four movie? Well, sort of.

As Fantastic Four: First Steps heads towards its final act, the group is torn between two impossible choices: sacrifice all of Earth to Galactus, or Reed and Sue must give up their child Franklin, who contains the Power Cosmic and enough energy to satiate Galactus' hunger.

Credit: Marvel Studios In their MCU debut, the Fantastic Four become a Fantastic Five with the arrival of Reed and Sue's son, Franklin Richards. Worries that he might not be "normal" are confirmed in Fantastic Four: First Steps when Galactus recognises that the boy can wield an unlimited energy known as the Power Cosmic (presumably because of the "cosmically compromised DNA" shared by both of his parents).

As is usually the case with MCU movies these days, The Fantastic Four: First Steps includes both a mid-credits and a post-credits scene. And also sticking to the traditional formula, one is a goofy little stinger, while another has serious ramifications for the MCU.

Robert Downey Jr's Doctor Doom has finally stepped into the Marvel Cinematic Universe. In one of the most crucial credit scenes for 'The Fantastic Four: First Steps,' viewers were introduced to the masked metal villain,

The Russo Brothers have warned fans to wait through the credits when they watch The Fantastic Four: First Steps for an Avengers: Doomsday tease, while Robert Downey Jr. is teasing his Doctor Doom research.

The Fantastic Four: First Steps has finally arrived, and it ushers in a new era for the MCU: Marvel Phase 6. Marvel movies are known to be loaded with cameos and Easter eggs, and the Fantastic Four digs up some lesser-known adversaries from the comics that you may or may not have heard of.