"About 'Common Man', the delay in starting it has been completely my fault. As a producer, I failed to put things together. Working towards it," tweeted Kunder.
The news that Big B will be a part of the movie was announced in December last year. Kunder had said that he waited for six years for the right script to approach the megastar.
The editor-turned-director, who is married to choreographer-filmmaker Farah Khan, also has other projects like "Joker" and "Kick" in the pipeline.