M. Night Shyamalan took to Twitter on Tuesday to announce that he'd begun casting his next untitled genre movie for Universal, and sure enough, multiple sources tell Collider that Alex Wolff is in talks for one of the main roles. Plot details are being kept under wraps, though sources likened Wolff's role to the film's third lead, much as he was in Hereditary behind Toni Collette and Gabriel Byrne. Universal had no comment, while representatives for Wolff did not respond to multiple requests for comment this week. Last September, Universal announced that Shyamalan would write and direct …