https://www.cnet.com/news/watch-the-first-glass-trailer-bring-together-split-unbreakable/

The trailer begins with Sarah Paulson, who plays a psychiatrist expressing her skepticism about the superhero (and villain) abilities posessesed by David Dunn (Bruce Willis), Kevin Wendell Crumb (James McAvoy) and Elijah Price (Samuel L. Jackson). 

But, as you can imagine, that skepticism is short-lived as a the remainder of the trailer is a showcase of Dunn's durability and strength, the darker and more powerful sides of Crumb's many personalities and Price's Machiavellian scheming as Mr. Glass.