Sivakarthikeyan signs his next for AM Ratnam?

Sivakarthikeyan, who is currently busy with the shooting of his next film with director Bakyaraj, has signed his next film for Veteran producer AM Ratnam. The movie is expected to be directed by Vignesh Shivan of Naanum Rowdy Dhaan fame. However, the official confirmation regarding other cast and crew of this movie will be made only next year, after Sivakarthikeyan completes his current projects.