Shyamalan also confirmed the return of Bruce Willis as David Dunn and Samuel L. Jackson as Elijah Price/Mr. Glass for Glass.
The end of Split welcomed back Bruce Willis as David Dunn and tied Split to the Unbreakable universe, hinting of a possible crossover between the two films.
It is now confirmed that Glass will be a sequel to both Split and Unbreakable.
For months speculation over the possibility of whether or not M. Night Shyamalan would be tackling an Unbreakable sequel or a Split sequel erupted after the release of Split and today the speculation ends.