Riding high on three successive weeks at the top of the North American box office, director M. Night Shyamalan teased that he may be working on a follow-up to “Split.”

“I have an 11 page outline for my next film in my bag. I can’t tell you what it is, but If you’ve seen #Split…” he tweeted on Saturday.

I have an 11 page outline for my next film in my bag. I can't tell you what it is, but If you've seen #Split… — M. Night Shyamalan (@MNightShyamalan) February 4, 2017

“Split,” the story of a man with 23 personalities, earned $14.6 million this weekend at the domestic box office, narrowly beating horror retread “Rings.” “Split” has grossed $98.7 million stateside after three weekends.

The Philadelphia-based filmmaker has said that “Split” is the second of a trilogy starting with 2000’s “Unbreakable.” He told USA Today he’s “pretty excited” about the outline he’s got so far. “It’s very big, so that scares me a little.”

“Split” was produced by Jason Blum’s Blumhouse Productions and the director’s Blinding Edge Pictures on a reported $9 million budget. Universal Pictures is distributing the film in North America.