“Split” – It’s always tough with writer/director M. Night Shyamalan, who seems destined to never again repeat the commercial or critical success of “The Sixth Sense,” and seemed to hit an all-time low with the Will Smith disaster “After Earth,” but seemed to be on the rebound with his last outing, “The Visit.” So there’s a lot riding on “The Split,” and early word is that it’s another step forward.