Top: Unbreakable; Bottom: Split
Spoilers for the horror/thriller Split ahead: Writer-director M. Night Shyamalan is following that film with Glass, which will function as a sequel to both Split and his earlier film Unbreakable. After a string of critical and commercial flops including The Happening, The Last Airbender and After Earth, Shyamalan was on the road to mending his reputation with the horror flick The Visit, which was followed up with Split. Split received generally positive reviews and grossed $276.9 USD at the worldwide box office, against a budget of $9 million USD.
Split starred James McAvoy as Kevin, a man with 27 split personalities, who kidnaps and terrorises teenager Casey (Anya Taylor-Joy) and her two friends. Unbreakable was about a man named David (Bruce Willis) who survives a train crash unscathed, and is sought out by comic book art curator Elijah Price/Mr. Glass (Samuel L. Jackson). Mr. Glass, who has brittle bone disease, crafts a supervillain-superhero dynamic between himself and David. Split’s big twist was that it took place in the same fictional universe as Unbreakable, with Willis making a cameo at the end of the film.
McAvoy, Taylor-Joy, Willis and Jackson have all signed on to return in Glass. As can be expected, plot details beyond this are being kept under wraps. Shyamalan announced on Twitter that he has just completed the third draft of the screenplay, adding cryptically that he “Looked through character's eyes this pass” and let his characters “messy up the plot in any way they wished.” Glass is expected in theatres in January 2019.