The following story is LOADED with spoilers for Split, so for real, stop reading now if you haven't yet seen it.
Split was a spectacular return to form for writer/director M. Night Shyamalan, who also capitalized on his horror roots with The Visit, but returned to a familiar world in the closing moments of this latest thriller. As you know, Shyamalan shows Bruce Willis' Unbreakable hero, David, in a diner watching the exploits of James McAvoy's lethal killer, The Horde. The man is on the loose, and Split now suggests that David will track him down, but the Blu-ray for Shyamalan's movie proves he had an alternate ending.
In the movie, the last glimpse we get of Kevin (James McAvoy) and his multiple personalities has him on the lam, and staring into a mirror. M. Night Shyamalan shot an alternate ending, which he shows on the new Blu-ray, where Kevin, instead, is sitting on a rooftop overlooking a school (shown below), where his different voices are talking aloud, saying:
So why didn't we get that ending, with Kevin overlooking the school? In a taped introduction to this VERY short shot of Kevin, the alternate ending, M. Night Shyamalan explains why he cut it, saying:
M. Night Shyamalan also explains that he had a hard time figuring out where this alternate ending scene of Kevin glaring at the school would even fit, if it would go before the diner tag with Bruce Willis, or after it. The director had to know that he would lose the audience's focus on Kevin the moment that he showed Willis in character as David once again. Because the implications of that reveal, and what it might mean for Unbreakable 3, would be all anyone would want to talk about... not Kevin (James McAvoy) looking down on a school.
Split was out on Digital HD as of April 4. It will reach Blu-ray, DVD and On-Demand on April 18, from Universal Pictures Home Entertainment.