The Norweigan village that is seen in the opening of Thor is the same place seen in the opening for Captain America: The First Avenger.
All-Father Odin is most famously known for having just one eye, and we get to see how he lost it in the opening battle with the Frost Giants.
Odin's treasure vault is a treasure trove of Easter eggs, including The Eternal Flame, a mystical object that would go on to become a key item in Thor: Ragnarok.
This scene is pivotal in the Marvel Cinematic Universe, because it's one of the only times that Thor wears his trademark helmet.
An object used by Asgardians in the source material to summon the Lurking Unknown into their dimension.
The tablet contains the formula for the Lifeline Formula, which can heal and rejuvenate anyone, and even make them immortal.
A mind-controlling item from the pages of Thor comics.
Another trademark of Odin are his two ravens, Hugin and Munin, seen here atop his throne.
Our first look at an Infinity Gauntlet in the MCU is also seen in Odin's vault. Though we later find out it's a fake, that should have been a dead giveaway with it being a Right-handed gauntlet.
Stan Lee isn't the only comic book writer to appear in the film as scribe J. Michael Straczynski can also be seen in the film. Straczynski previously wrote Thor from 2007 to 2009 for Marvel and has a Story By credit on the film.
The city that much of Thor takes place in is Puente Antiguo, New Mexico, which translates to "old bridge." a reference to the Bifrost.
A billboard in town advertises a location that it calls "The Land of Enchantment..." which they claim will prompt visitors to "Journey Into Mystery."
Journey Into Mystery, of course, is the comic book series where Thor made his debut.
Lee appears in the film as a man driving a truck that tries to pull Mjolnir out of the ground.
Back in the early days when Thor was a traditional superhero and not the actual god of thunder, his secret identity was Dr. Donald Blake, referenced here.
Blink and you'll miss the high school mascot in Puente Antiguo - The Vikings!
The cosmic cube/Tesseract can be seen in the children's book about Norse Mythology, sitting right in Odin's hand.
Jeremy Renner makes his debut as the archer-Avenger in the film, and his presence is first teased with this shot.
Thor draws Jane a photo of the nine realms, and The World Tree, Yggdrasil, which is also reference in Captain America: The First Avenger.
Walter Simonson, the comic book creator who has arguably had the biggest influence on Thor comics ever, also makes a cameo appearance.
The post-credit scene in Thor directly sets up the events of Marvel's The Avengers with Loki controlling Dr. Selvig.
A member of the rock-humanoid species, The Kronan, appears in the film and is quickly dispatched by Thor. The Kronan made their debut alongside Thor in Journey Into Mystery #83.
Dr. Selvig's chalkboard in the film contains a number of interesting Easter eggs, including:
"616 Universe" - Each different Universe in Marvel Comics has a number to distinguish it from others. The primary Marvel Universe was known as 616.
The Fault - A rip in the fabric of the universe as seen in War of Kings #6.
The Crossroads - A gateway dimension from Incredible Hulk #300 with doorways to other worlds.
Nexus of All Realities - A place in the universe where parallel worlds intersect.
Simonson's Theory of Relativity - A nod to Thor writer/artist Walter Simonson, seemingly the Einstein of the MCU.
Lee appears in the mental institution with Selvig, in search of his shoe.
Each film in Phase 2 of the MCU features someone getting their hand cut off as a reference to The Empire Strikes Back. Thor has his hand lopped off in the movie, but it's a ruse.
This beast that we see is given a different name, but he sure does look like Thor villain The Mangog, doesn't he?
This is the realm of Surtur, who we will meet in Thor: Ragnarok.
Theorized by many to be Adam Warlock's cocoon, Guardians of the Galaxy director James Gunn has clarified since that this is an early version of the cocoons used by The Sovereign from Guardians of the Galaxy Vol. 2.
The debut of The Collector comes in one of the post-credit scenes for The Dark World, a character that will play an important role in the MCU at large.
This marks the first time that the phrase "Infinity Stones" is used in a Marvel movie, and the rest is history.
Thor's quick reference here is to the events of Avengers: Age of Ultron.
The last time we saw Thor before this was the ending of Avengers: Age of Ultron where he took off to find The Infinity Stones. As he says, he didn't find any (though he's interacted with three of them at this point).
This is the evil Surtur, who will bring about Ragnarok. He's voiced by Clancy Brown who also does the voice of Gorilla Grodd on The Flash TV series.
Skurge has a pair of assault rifles that he's fond of, a reference to the time when the character picked up the guns and quite enjoyed using them in battle.
The stage where Loki watches the play of his life also has his trademark horns atop it.
Playing Thor in the play seen in the film is Chris Hemsworth's brother, Luke Hemsworth, himself an actor most well known for HBO's Westworld.
He even makes a reference to the events of The Avengers in his dying monologue....
...while also referencing the time he turned Thor into a frog (something that actually happened in the source material).
Actor Sam Neil appears as Odin in Loki's play, reuniting him with Waititi after appearing in Hunt for the Wilderpeople.
It was teased after his solo film, but Benedict Cumberbatch appears again as Doctor Strange in the film, now very comfortable in his role as Sorcerer Supreme.
The Grandmaster's Tower of Champions features the faces of a mix of Thor and Hulk characters, including Beta Ray Bill, The Night-Crawler, Ares, Bi-Beast, and Man-Thing.
The same planet from the events of the Planet Hulk comic series makes its MCU debut.
This line is in reference to The Grandmaster as one of the ageless Elders of the Universe (Along with The Collector).
The Contest of Champions comes from the Marvel comic of the same name, where The Grandmaster and Death played a game using Marvel heroes as their pawns.
As a reference to The Grandmaster's blue skin in the comics, the character has a blue streak down his chin.
One of the first appearances of the character Valkyrie was in The Incredible Hulk #142, referenced here in Valkyrie's label.
The two characters were major players in the Planet Hulk storyline and make their MCU debut. Korg is also played by director Taika Waititi.
Hela reveals to us that Odin's Infinity Gauntlet from the first film is fake, so that clears up one potential plot hole for Avengers: Infinity War.
Korg's line here is a direct reference to Waititi's horror comedy, What We Do in the Shadows, a mockumentary about a group of vampires.
It's a grown up joke, ask your dad.
Lee appears a the hair-cutter of Sakaar, his most elaborate costume yet.
Thor wears his helmet for the second time ever!
In The Grandmaster's introduction for Hulk he calls him "The Defending..." which is accurate in that he is both his current champion but also that The Hulk was a founding member of The Defenders in the comics.
It should go without saying that this particular adjective is frequently used to describe The Hulk.
Hulk's attire in the film is nearly identical to his costume in the Planet Hulk storyline.
The wallpaper in The Grandmaster's viewing box is lifted directly from Jack Kirby's art for Fantastic Four #64
Thor attempts to calm The Hulk using hte same lullaby that Natasha used in Avengers: Age of Ultron.
Hulk's swinging of Thor in this scene is nearly identical to how he smashed Loki in The Avengers...
...Who is all to pleased to see it happen to someone else.
This is the first instance of uncensored nudity in a Marvel Studios movie.
Speaking of Black Widow in Avengers: Age of Ultron, her attempt to contact Banner on the Quinjet is repeated after some jostling at the controls.
One of the post-credit scenes for Ragnarok sets us up directly for Avengers: Infinity War, teasing the arrival of Thanos.