Khaidi No.150 is milestone film for megastar Chiranjeevi and also a very special film for his son Ram Charan. The comeback and 150th film of Chiru also marks debut for Charan as producer. The VV Vinayak directorial film is being made under Konidela Production Company.Even before director and script for the milestone venture was concluded, Chiru several times stated to bring in all mega heroes to play cameos whether in a crucial sequence or in a special song. We have seen Chiru playing brief roles in Charan's couple of movies Magadheera and Bruce Lee. Now, it's Charan's turn. The Yevadu star will be seen shaking a leg with his mentor and dad.If a grapevine is to be believed, a promotional song is being planned on Chiranjeevi and Ram Charan for Khaidi No.150. This song will be released few days prior to theatrical outing of the film and it will also be included in the film, maybe in the rolling credits at the end. So, it will be an eye-feast for mega fans to see Chiru and Charan dancing together for a special tune to be rendered by sensational composer Devi Sri Prasad. It is learnt that, DSP was asked to compose a foot-tapping number. In fact, he would be delighted to render the special song. We can expect, DSP too to be part of the song.Other mega heroes like Allu Arjun, Sai Dharam Tej and Varun Tej are willing to take part in the film. Besides the special song, Khaidi No 150 has several other surprises in the store for fans which are kept under wraps for now.Meanwhile, Khaidi No.150 audio release is scheduled for December 18th and the film is set to grace theaters on January 11th for Sankranthi.