A while back, Charlie was scripting an adaptation of The Knife of Never Letting Go, the first book in Patrick Ness' YA trilogy, Chaos Walking. In 2014, though, Variety reported that Charlie was out and Jamie Linden had taken over the writing. Now, Deadline are talking as if Charlie's still on board:

Doug Liman has backed out of directing Warner Bros’ Justice League Dark, the film that was to be a cog in the studio’s DC Universe of movies. The move is not surprising, as Liman’s schedule is officially tied up for the time being: As we reported, Lionsgate is moving forward with the Daisy Ridley-Tom Holland movie Chaos Walking based on Patrick Ness’ YA novel, with a franchise play being eyed and Liman at the helm. It is now in preproduction and is currently on offer at the Cannes market, and Liman is moving along with it.

[...] Ness is co-writing the screenplay with John Lee Hancock and Charlie Kaufman. Allison Shearmur  and Doug Davison are producing. (Source)

I suspect they're wrong, but it could be that Charlie's now re-attached. In August last year at Karlovy, Charlie said "I'm not involved with that any more. I did the first draft." (That's an hour-long video. He talks about Chaos Walking around the 45:45 mark. The whole clip's worth watching if you've never seen it!)