Abhishek is no longer a part of 'Delhi 6' and Hrithik has signed on the dotted line

Abhishek Bachchan opted out of 'Rang De Basanti' director Rakyesh Mehra's next 'Delhi 6', reportedly based on Mehra's growing up days in Chandini Chowk in Delhi.
If sources to be believed, Hrithik Roshan has been signed up for the role. "Abhishek is no longer a part of 'Delhi 6' and Hrithik has signed on the dotted line," confirmed a source.
With Abhishek walked out of the film, director Rakyesh also has dropped the idea of casting Amitabh Bachchan for a cameo.
We couldn't contact Abhishek to know why he opted out of the film at the last time.