It's learned that when Glass opens in two weeks that it will feature footage from Unbreakable that wasn't originally a part of the first movie.
During an interview while promoting Glass, director and writer M. Night Shyamalan told Fandango:
I don’t want to give too much away but you do see moments of the original Unbreakable...scenes you didn’t get to see.
Shyamalan revealed the tidbit while discussing that Spencer Treat Clark is back playing Joseph Dunn, the son of Bruce Willis' David Dunn, so it could be possible that the unseen Unbreakable footage involves a father and son scene.
The interview also revealed that Glass picks up a couple of weeks after Split, and that James McAvoy performs about 20 different personalities (Kevin Wendell Crumb houses 24 personalities, including The Beast).
Glass gets released Jan. 18.
EXCLUSIVE: Tickets are now on sale for @MNightShyamalan's #GlassMovie at @Fandango! For my first interview of 2019, I sit down w/ Night, Sam Jackson and James McAvoy to learn more about the year's first major release. pic.twitter.com/bbxJPhGopk— Erik Davis (@ErikDavis) January 4, 2019
M. Night Shyamalan brings together the narratives of two of his standout originals—2000’s Unbreakable, from Touchstone, and 2016’s Split, from Universal—in one explosive, all-new comic-book thriller: Glass.
From Unbreakable, Bruce Willis returns as David Dunn as does Samuel L. Jackson as Elijah Price, known also by his pseudonym Mr. Glass. Joining from Split are James McAvoy, reprising his role as Kevin Wendell Crumb and the multiple identities who reside within, and Anya Taylor-Joy as Casey Cooke, the only captive to survive an encounter with The Beast.
Following the conclusion of Split, Glass finds Dunn pursuing Crumb’s superhuman figure of 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.
Joining the all-star cast are Unbreakable’s Spencer Treat Clark and Charlayne Woodard, who reprise their roles as Dunn’s son and Price’s mother, as well as Golden Globe Award winner Sarah Paulson (American Horror Story series).
This riveting culmination of his worldwide blockbusters is produced by Shyamalan and Blumhouse Production’s Jason Blum, who also produced the writer/director’s previous two films for Universal. They produce again with Ashwin Rajan and Marc Bienstock, and Steven Schneider and Kevin Frakes, who executive produce. Gary Barber and Roger Birnbaum also serve as executive producers.
A Blinding Edge Pictures and Blumhouse production, Glass will be released by Universal Pictures in North America on January 18, 2019, and by Buena Vista International abroad.