Superstar Mammootty is currently busy with the shooting of "Drona". After the completion of this movie, he is all set to join the sets of "Pramaani" which will be directed by B Unnikrishnan. It will be produced by B C Joshy under the banner of Surya Cinema. Moreover, according to sources, the superstar will start shooting for "Pokkiri Raja" after the completion of "Pramaani". These movies are expected to hit the screens by mid 2010.