The Bejoy Nambiar-directed thriller is about the unusual friendship between a paralysed chess grandmaster named Pandit Omkarnath Dhar, played by the 73-year-old actor and Farhan Akhtar's Danish, who is an ATS officer.
Bachchan depended on Nambiar and says his approach to the role in the movie was assisted by the director.
"I do not think it was limiting... It was exciting to be doing a role that I had not done before... The approach to the character was dictated by the director," Bachchan told PTI in an email interview.
"Its story is unique and the way it has been presented is also intense and intriguing. It is a thriller with drama and emotion."
"Wazir", which will hit theatres this Friday, has been produced by Vidhu Vinod Chopra, who had initially planned to make the film in Hollywood.
Bachchan, who made his Hollywood debut in 2013 with a special appearance in Baz Luhrmann's "The Great Gatsby", said he would love to do the Hollywood version of "Wazir" if approached.
But Bachchan attributed the back-to-back thrillers as a mere co-incidence and not a conscious choice.
"I have not found a liking for thrillers .. Thrillers have found a liking for me," he joked.
