Galactus ends up giving the Fantastic Four an ultimatum, telling a pregnant Sue that he'll spare Earth if she gives up her powerful unborn child to him. The group declines his deal, which further angers Galactus, sending him on a vengeful mission to both destroy Earth and take Sue’s child.

When Entertainment Weekly asked Fantastic Four: First Steps director Matt Shakman if Downey Jr. filmed that post-credits scene, the filmmaker pleaded the fifth. "For others to talk about," he teased. However, Shakman did reveal that it was the Russo brothers who helmed the post-credits scene since it was shot for Avengers: Doomsday.

This iteration of the Fantastic Four has a standalone adventure without all the burden of the MCU's history and cast of characters.

As the credits finish rolling on The Fantastic Four: First Steps, a quote from Fantastic Four co-creator Jack Kirby appears on screen, saying, "If you look at my characters, you will find me. No matter what kind of character you create or assume, a little of yourself must remain there."

The true power of The Fantastic Four: First Steps is the love between a mother and her child.

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

I t might be off-putting to mention Stan Lee when The Fantastic Four: First Steps wears its affections for Jack Kirby on its knit sleeves. But Lee used to say that Marvel's stories reflected the world outside our window.

The Fantastic Four: First Steps officially lands in theaters tomorrow, July 25, and will introduce the first new live-action take on Marvel’s First Family in a decade. Meanwhile, a crossover featuring movie tie-in skins will arrive in Marvel Rivals starting tomorrow.