WARNING! This issue contains spoilers for The Fantastic Four: First Steps #1 Stan Lee’s cameo appearances were a beloved staple of Marvel movies and a delightful nod to the legendary creator.

Mr. Fantastic, Invisible Woman, Human Torch and The Thing made their first appearance in November 1961, when Stan Lee and Jack Kirby produced the comic book “Fantastic Four #1,″ according to CBR.

With this being the Fantastic Four, it should be pretty obvious that Doctor Doom is never too far away. But, as of yet, there's been no concrete talk of Robert Downey Jr.'s Marvel supervillain ...