Other Movies

Taika Waititi referenced several non-MCU movies besides Green Lantern. For example, 1971's Willy Wonka and the Chocolate Factory was a source of inspiration for the Grandmaster's eccentricities and introduction.

The movie Point Break comes up when Thor tries to gain access to the Quinjet. When all voice recognition commands fail (including Strongest Avenger), Point Break works. It was also Tony Stark’s nickname for Thor in the first Avengers flick, because the Asgardian bore a resemblance to Patrick Swayze.

Ace Ventura: Pet Detective (or South Park) shows up when Loki admits that he left his father at the Shady Acres retirement home (demolished by the time Thor discovers Loki’s treachery). In Ace Ventura, Shady Acres was a psychiatric hospital; in South Park, it was a retirement home.

Thor: Ragnarok also sends What We Do in the Shadows a nod. Before his fight with Grandmaster’s champion, Thor chooses a weapon, and Korg (voiced by Taika Waititi) asks the God of Hammers if his weapon of choice is a big wooden fork. When Thor declines the offer, Korg says that the fork would be useful, but only against three vampires huddled together.

This could also confirm the existence of vampires in the MCU.

Given these references, choosing to cast Matt Damon as an Asgardian actor portraying Loki actually makes sense, because Damon appeared as Loki in Kevin Smith's Dogma in 1999.