I've been waiting for this for a long time, and so have a lot of other (older) comic book fans. If you've never seen Unbreakable, it holds up very well, which is no easy task, given that it was released in 2000, just as the second wave of super movies were hitting the screens.
Unbreakable was a more mature, dramatic superhero movie, with only a couple of fight scenes; it's the type of superhero movie that you would not really expect to be made today, what with most movies in the MCU and DCU going bigger and bigger with the conflicts and stakes. Unbreakable dealt with how superhero tropes would play out in real life, and was a moody but ultimately uplifting flick that no one really expected a sequel to, especially after M. Night screwed the pooch like four times in row, with clunkers like After Earth, The Last Airbender and The Happening failing hard critically.
However, M Night has been doing better in the last decade, putting his name on the decently received Devil, The Visit and Split, which Glass also functions as a sequel to. Glass is set immediately following the conclusion of Split, with David Dunn in pursuit of Kevin Wendell Crumb's superhuman persona of The Beast in a series of escalating encounters while the shadowy presence of Elijah Price, going by "Mr. Glass", emerges as an orchestrator who holds secrets critical to both men.
Check out the poster below, Glass releases January 18, 2019.