In a new international trailer for M. Night Shyamalan's Glass, dissociative identity disorder patient Kevin Wendell Crumb (James McAvoy) unleashes his most dangerous personality: The Beast. Glass is the sequel to last year's Split, which - in a surprise ending twist - revealed itself to be set in the same universe as Shyamalan's 2000 film Unbreakable, about a man called David Dunn (Bruce Willis) who discovers he is immune to physical injury in the wake of a devastating train crash.

Willis' character is returning in Glass, along with brittle-boned villain Elijah Price a.k.a. Mr. Glass (Samuel L. Jackson). Like Unbreakable, Glass looks to be a twisted homage to the superhero movie genre that incorporates the horror elements of Split. As revealed in previous trailers, Mr. Glass sets his sights on The Beast as the perfect new nemesis for David, and proposes a bad guy team-up.

Related: Glass Theory: David Dunn's Powers Can Cure Kevin Crumb

Amid all of this madness is psychiatrist Dr. Ellie Staple (Sarah Paulson), who is tasked with breaking David, Kevin, and Elijah's "delusion" that they have super abilities like characters from a comic book. Also returning to join the cast is Anya Taylor-Joy, who played "final girl" Casey Cooke in Split, and has already faced The Beast (and survived) once already. Check out the new international trailer for Glass below.

Interestingly, this trailer offers a couple of scenes featuring Luke Kirby's character, Pierce, who is an orderly at the psychiatric hospital where the three patients are being treated. Pierce is seen telling Mr. Glass that he has "two new friends," confirming that Elijah is at the hospital first, while David and Kevin are admitted together (perhaps after a public altercation). Pierce appears again later in the trailer, trapped between Mr. Glass and The Beast... which isn't a great position to be in.

The international trailer for Glass also sheds some light on Mr. Glass' motivations. In Unbreakable's twist ending, Jackson's character was revealed to be a villain, and his primary goal was to be the villain to David Dunn's superhero - just like in his beloved comic books. In Glass it seems like he is keen to expose The Beast's undeniable superpowers (like super-strength and the ability to walk along walls) to the world, in order to prove that superheroes and supervillains really do exist.

Shyamalan's movies have become famous for their big ending twists, so while the trailers do seem to have revealed a lot about Glass, we're expecting the movie to hide a few surprises up its sleeve as well.

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