Dhanush and Karthik Subbaraj were supposed to do a film for Sri Thenandal Films. This news has been running around for quite some time now.
The latest we hear on this front is that there is a change in the production house, with Y Not Studios Sashikanth set to take over this project. So it's going to be Dhanush - Karthik Subbaraj - Y Not Studios.
The shoot is set to begin this summer. An extensive schedule has been planned in London. Let's await an official confirmation from the people concerned.