Watch the First Official Trailer for M. Night Shyamalan's 'Glass'

Following the recent reveals of its official poster and first look images, the first trailer for M. Night Shyamalan's upcoming Unbreakable and Split sequel, Glass has debuted at San Diego Comic-Con. Following the ending of Split, which takes places after the events of Unbreakable, we find the characters of Bruce Willis, Samuel L. Jackson, and James McAvoy locked up in an institution with a doctor played by Sarah Paulson, poised to overlook the three men who are convinced they're "comic book char...