The actor takes on the role of a wrestler's assistant in the comedy co-starring Ajay Devgn.
Shetty told The Times of India: "When I narrated the character to Abhishek, I told him he had to be completely besharam and not come with baggage. He plays a completely different character from what he's done before.
"The scenes between Ajay and him, especially the one in which they are introduced to each other, is outstanding!
"People will be shocked to see Abhishek in this avatar. Apart from the comic capers, there are some stunning action sequences too. In fact, there's more action in this film than in Singham."
He continued: "Abhishek has worked hard on the action sequences. One of my favourite scenes is the hand-to-hand combat Ajay and Abhishek indulge in while fighting some goons. A glimpse of these scenes will be seen in the trailer."
John Abraham said recently that he cannot wait to get romantic on screen with Bachchan in the sequel to their comedy Dostana.
However, Bachchan is also reportedly up for playing Hamlet in a Bollywood adaptation of the Shakespeare play.