Absolutely, Mukesh Ambani can't be considered a Megastar cz he's not a filmstar. Megastar is one who delivers back to back Blockbusters.... Not someone who owns an ipl/isl/pro kabaddi team. In simple words, megastar/superstar tag completely based on box office performance.... It has nothing to do with someone's cricket, restaurant business. So, neither Vijay Malya nor srk can be considered megastar due their ipl teams.
23% hi sahi Preeti Zinta has share in a ipl team.... But Salman, Rajnikanth, Aamir etc don't have that. So according to your logic srk Preeti Zinta>>>Salman/Rajnikanth/Aamir..... LMAO!