Trailer added below.
Before 3 Idiots, director Rajkumar Hirani had planned to make Munnabhai Chale Amerika. Even the trailer of the film was released, but the director then decided to take a break from the Munnabhai series and went on to make 3 Idiots.
Now after the release and super-success of 3 Idiots, Hirani has started working on the script of the third part, in the much-loved Munnabhai series of films “Munnabhai Chale Amerika is currently in its scripting stage, once the script is complete we will finalize the cast for the other characters.”
Sanjay Dutt and Arshad Warsi are quite obviously confirmed to play Munnabhai and Circuit.
Munnabhai Chale Amerika Trailer below