Abhishek-Vidya Balan together?

Finally Abhishek Bachchan and Vidya Balan paired up for Amitabh Bachchan's production house ABCL's next, titled 'Johnny Walker'. Thought Vidya and Abhishek shared screen space in Mani Ratnam's 'Guru', but it was Aishwarya Rai, who played opposite Abhishek. Vidya Balan played with Madhavan. Percept Picture will co-produce the film; it will be directed by Shoojit Sircar. As per latest, Amitabh Bachchan will play an important role in the film. As per source, the director is looking for an actress of great stature to play opposite Amitabh Bachchan.
In a recent interview, director Sircar revealed, "The film is about an old couple who embarks on the journey of self-discovery."
When asked, whether Amitabh Bachchan is writing the script of this film, Shoojit Sircar said, "I don't know. Bachchan is writing the script, its news to me."
Bachchans' home production, but instead of would-be daughter-in-law Aishwarya Rai, Vidya Balan signed up for playing lead opposite Abhishek, does it mean after marriage Aishwarya Rai wouldn't be allowed to continue working in films? Sure it's a million-dollar-question, but when asked, director Shoojit Sircar refused to comment.