Shyamalan shared the news on Twitter:
It's taken 17 years but I can finally answer the #1 question I get, "Are you making a f#&@ing sequel to Unbreakable or what?"— M. Night Shyamalan (@MNightShyamalan) April 26, 2017
"Split" was a huge hit, earning more than $275 million worldwide on just a $9 million budget. And it followed on the heels of another hit, 2015's "The Visit." So, Shyamalan is on a hot streak.
So, how can "Glass" be a sequel to both movies? SPOILERS AHEAD!
In "Split," McAvoy played a kidnapper named Kevin Wendell Crumb with multiple personalities, including "The Beast," with superhuman strength. At the end of the movie, customers at a diner watch news coverage of the crimes and one remarked Kevin's similarity to another criminal who was confined to a wheelchair. Sitting next to that patron is David Dunn (Willis), who reminded her that his name was "Mr. Glass" (Jackson).
A few months ago, Shyamalan explained that he initially included Kevin in "Unbreakable" but had to cut him out. Now, he can bring together the three characters as he intended.
Universal Pictures will release #Glass on January 18, 2019 all over the world. How's that for not keeping a secret!— M. Night Shyamalan (@MNightShyamalan) April 26, 2017