Why was Arjun Rampal removed from the SRK camp ? 

There were speculations about once upon a time good friends, Arjun Rampal and Shah Rukh Khan having a fall out. The rumors stated that Shah Rukh Khan is extremely upset with one of Arjun’s former publicists for interfering into the movie’s promotions of RaOne when this agency had nothing to do with the movie.The real trouble started after Ra. One tanked at the box-office and Shah Rukh started wondering if he should have cast someone else (other than Arjun) as his arch nemesis in Ra. One. People close to SRK were anyways not excited about Arjun playing the main villain, who had got the role because of his proximity to the Khan.It is heard that Arjun was not a part of SRK’s guest list anymore, and the actor couldn't be bothered.