Warning: There are major spoilers ahead for "Glass.""Glass"the sequel to "Unbreakable" and "Split," starring Bruce Willis, James McAvoy, and Samuel L. Jacksonis in theaters.If you go back and watch the first two films, both contain dialogue, comic images, and scenes that appear to hint at the latest movie.A twist in "Glass" was majorly hinted at in "Split" and Elijah's mother teases the plot for "Glass" towards the end of "Unbreakable.""Glass," which follows three men who believe they have super abilities, is finally in theaters. It's the end of the trilogy that first started with "Unbreakable" 19 years ago, and stars Bruce Willis as David Dunn, James McAvoy as Kevin, Samuel L. Jackson as Elijah Price.Many moviegoers may be shocked by how many tiny references and nods to "Glass" were in M. Night Shyamalan's earlier films, "Unbreakable" and "Split." The famed director told The Hollywood Reporter that James McAvoy's character Kevinwho was first introduced in 2017's "Split"was even a part of the original script for 2000's "Unbreakable."INSIDER recently watched each film in the trilogy and rounded up the tiny moments, pieces of dialogue, and images that all appear to have been hinting at the plot of "Glass." Keep reading to see everything we noticed.The first limited-edition comic book Elijah Price/Mr. Glass ever receives as a child hints at a future showdown between David and The Beast.On the surface, the comic looks like a tease of the rooftop showdown between David's hero and Kevin's villain the Beast that Elijah attempts to orchestrate in "Glass," but it's so much more than that.Most notable here is the use of color.In each of the three movies, director M. Night Shyamalan has used a distinct color to identify each of his main characters. Often seen in their clothes, there's purple for Elijah, green for David, and yellow for Kevin.Despite the main fight serving as the comic cover's focal point, it's important to note the color purple. The hero and villain are surrounded by it, not only on the comic cover, but also in the tissue wrapping. On the comic cover, it's present in the background, just as Mr. Glass is an omniscient presence ultimately presiding over major events in both David and Kevin's lives.It's Mr. Glass who brings the two together in the movie because of the train derailment in "Unbreakable" and then who wants to orchestrate a fight between the two on top of a new building in Philadelphia.That same scene between Elijah and his mother may contain another reference to "Glass."When a young Elijah discovers the limited edition comic waiting for him in "Unbreakable," his mother tells him, "They say this one has a surprise ending."If you think about that line now, maybe it didn't refer to the ending of "Unbreakable," but the ending of "Glass," which kills off all of its three main characters. That was certainly a surprise.Mrs. Price asks her son in "Glass" if their story is a limited edition. Elijah tells his mother it's not, and instead responds that it's an origin story, suggesting there is more to come despite their deaths.Another comic later in "Unbreakable" appears to hint at the connection between Mr. Glass, David Dunn, and the Beast as well.While in a comic-book store, Mr. Price/Glass stumbles upon a comic called "The Adventures of Sentryman." It shows a Captain America-type going up against a group of villains.At first glance, it looks like the comic simply illustrates the relationship between Elijah and David as archenemies where Elijah is the purple villain the supehero (David) approaches. But lurking in the right corner is a third character, which appears to hint at the Beast introduced in "Split."A black creature with red eyes towers behind the purple villain. In "Split," also seen above, drawings made by one of Kevin's personalities depict the Beast as a black creature with red eyes. Not only is it fascinating to see a beast creature on the magazine cover, but it's notable that he's in the purple villain's corner.In "Glass," Price convinces The Beast to team up and serves as his protector.See the rest of the story at Business Insider Click here to read full news..