Warren Ellis writing Arthurian movie

British writer Warren Ellis is working on a treatment of a movie based on Arthurian legend for 300 co-producers Hollywood Gang Productions.

The project from the Transmetropolitan and Doktor Sleepless writer is currently known by the working title Excalibur.

"On my desk, the treatment is called Untitled Arthurian Project," Ellis wrote on his website.

"I’m working directly with Gianni Nunnari, Oliver Kramer and Craig Flores (whom I was delighted to bump into on the Warner's lot the other day) and having a great time."

The project has no relation to Ellis's previous work on Marvel Comics' Excalibur.