The second trailer for Spider-Man: Into the Spider-Verse includes numerous fun callbacks to Marvel's comic book universe, from a surprise cameo by Spider-Gwen to villains the Green Goblin and Kingpin. What might have gone unnoticed, however, was a very brief blink-and-you'll-miss-it Easter egg for another superhero universe, entirely.
The trailer begins by taking us into the world of the film's star, Miles Morales. It looks like a typical teenager's bedroom, with random items dumped on the floor and posters hanging on the walls. In one section of the room is a drafting table, where Miles can be seen putting his creative mind to use crafting sketches. Hanging directly above the table are two drawings: one of a small, blocky object with white eyes and pointy ears, and the other of a superhero wearing red boots and blue pants, with a cape draped behind him.
For those familiar with the superheroes of the DC Universe, these are clearly versions of the legendary Batman and Superman.
Now, you might be wondering how Miles would be aware of two members of the Justice League, but the companies have a history of referring to each other's heroes and villains as fictional characters, and specific to Spider-Verse, this isn't the first time the young Spider-Man has flown his DC fandom flag. Spider-Man #239 featured Miles breaking into his Uncle Aaron's apartment to look for clues on a case he was investigating. After successfully finding and breaking into a hidden safe, Miles gave himself a mental pat on the back for his impressive detective skills, telling himself, “I’m like Batman.”
The Marvel and DC Universes have "crossed over" other times as well, with recent examples being Infinity Countdown: Captain Marvel #1 giving a nod to the Green Lantern Corps and Shazam, along with another Shazam Easter egg in Infinity Countdown Prime #1, and the DCU occupying one of the many Marvel multiverses.
On the DC side, the animated Teen Titans Go! to the Movies has released several promos and trailers calling out the likes of Ryan Reynolds' Deadpool. In the comics, Booster Gold recently made a comment that essentially declared the Marvel Universe part of DC's expansive Multiverse.
In theaters this Christmas, Spider-Man: Into the Spider-Verse stars Shameik Moore, Brian Tyree Henry, Jake Johnson, Mahershala Ali, Hailee Steinfeld and Liev Schreiber.