Shyamalan announced the news on Wednesday in a series of tweets.
The title of the new film appears to be derived from Jackson’s Elijah Price character in “Unbreakable” — also known by his pseudonym Mr. Glass. Willis also returns as David Dunn from “Unbreakable.”
McAvoy is reprising his “Split” role as Kevin Wendell Crumb and the 23 multiple identities, including The Beast who resides within. Also returning is Taylor-Joy as Casey Cooke, whose character survives in the film.
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“Glass” will follow the conclusion of “Split” with Dunn pursuing McAvoy’s The Beast in “a series of escalating encounters, while the shadowy presence of Price emerges as an orchestrator who holds secrets critical to both men.”
Producers are Shyamalan and Jason Blum, who also backed “Split” and “The Visit” for Universal. They produce again with Ashwin Rajan and Marc Bienstock. Steven Schneider will executive produce.
“Unbreakable” was released in 2000 and grossed nearly $250 million worldwide. Willis portrayed a security guard who survives a train crash and learns, thanks to Jackson’s comic book store owner, that he possesses superhuman powers.
“Split,” made for $9 million, has been a surprise success for Universal, hauling $275 million at the global box office. McAvoy portrayed a victim of childhood abuse diagnosed with dissociative identity disorder who kidnaps and imprisons three teenage girls. Willis made a brief uncredited cameo as David Dunn in “Split.”