Colors' Madhubala Ek Ishq Ek Junoon, produced by Nautanki Telefilms will see the entry of a major antagonist in talented actor Siddharth Vasudev. He essays the character of Bhujang Shastri who will be a major opponent of Sultan (Avinesh Rekhi). While Sultan has a softer side to his character, Bhujang we hear is ruthless and cruel. He has the ambition of making huge money and can do anything for it. We hear that Siddharth will be introduced through a big sea-side sequence. The actor will start shoot from 11 March 2013.