http://www.rediff.com/movies/report/...-/20151001.htm

Well, it is not news that Mani's next film will feature Rahman as the composer. But in the same article it is mentioned that

Kamal Hassan and Saif Ali Khan team up for a Tamil-Hindi political thriller, with a score by A R Rahman.

After four back-to-back films with composer Ghibran, Kamal Haasan is all set to collaborate with A R Rahman for his next film, Thalaivan Irukkiran.

A bilingual (Tamil and Hindi), the political thriller is titled Amar Hain in Hindi, and will have Saif Ali Khan share screen space with Kamal Haasan.

Kamal Haasan and A R Rahman last worked together 15 years ago -- for K S Ravikumar's 2000 dramedy Thenali.

Not sure if this is good or bad. While Rahman delivered chartbusters for both the Hassan movies that he has worked for ("Indian" and "Thenali"), they weren't his best. You always get the feeling that these two are not great friends although Rahman did grace Hassan's "50th year in cinema" celebrations and Hassan had a few good words to say about Rahman. They were going to work together for "Marmayogi" in 2008 but unfortunately that project was dropped. Let's see if this project materializes.