Mumbai: There's been a lot of speculation lately about what Aishwarya Rai Bachchan's next project will be. And now the buzz is that the new mommie may be a part of superstar Rajnikanth's next film ‘Kochadaiyaan’ where she is expected to do a guest appearance.

In that case, her rumoured next with Sanjay Leela Bhansali may not be her first on-screen appearance after all, post her delivery. Ash is said to be taking a year's sabbatical before making a comeback on the big screen.

Says a source, "There was a lot of back and forth on what project Rajnikanth would be working on, post his illness. But now he has already started work on his daughter Soundarya's film Kochadaiyaan. Though the leading lady for the film is yet to be finalised, it was decided from the very beginning that they would request Aishwarya to do a special appearance."

Film buffs lapped up the chemistry between Ash and Rajnikanth in Robot, which incidentally was the lone hit the actress delivered in 2010. So it won't be surprising if she grabs this opportunity; to be seen beside the Boss works for her in every way.

Adds the source, "Rajni sir shares a very warm relationship with Aishwarya and there's little chance that she would say no to him. Even during the making and promotions of Robot, it was evident that they would definitely work in a film together again. However, now that Ash has other family and professional commitments, it seems difficult for her to devote time for a full-fledged role and hence this."