Guardians of the Galaxy - Easter Eggs & Hidden Details

In the post-credits scene, after the Collector's museum is destroyed, Howard the Duck is seen sipping a drink and making a sarcastic comment. Voiced by Seth Green, this was the character's first appearance in a Marvel film since his infamous 1986 movie, reintroducing him into the Marvel Cinematic Universe.

Taneleer Tivan's collection is filled with references to the wider Marvel universe. Visible specimens include a Dark Elf from 'Thor: The Dark World', a Chitauri soldier from 'The Avengers', Cosmo the Spacedog (a telepathic Soviet dog and a member of the Guardians in the comics), and what appears to be Adam Warlock's cocoon.

Actor Nathan Fillion, a frequent collaborator with director James Gunn, provides the voice for the large blue alien inmate in the Kyln prison who threatens Peter Quill upon his arrival. It's a fun, hidden role for the cult-favorite actor.

The mining colony 'Knowhere' is revealed to be the severed head of a giant, ancient celestial being. Additionally, when the Collector is explaining the history of the Infinity Stones, a flashback shows a massive Celestial, Eson the Searcher, using the Power Stone to destroy a planet. This was the first significant depiction of the powerful space gods in the MCU.

In the film, Yondu is a space pirate, but in the original Marvel comics, he was a founding member of the Guardians of the Galaxy. The film re-imagines his character significantly but keeps his blue skin and incorporates his signature fin and arrow (re-imagined as a telekinetically controlled weapon).