Still Salman Khan the biggest superstar & Prabhas is still has a long way to cement his super stardom. And soon Prabhas's stardom will be limited to south only as Bollywood isn't blind enough to let an outsider earn any sort of market in their own industry. Chiranjeevi surpassed Big B in the 90's & they made sure to keep him down. Kamal Haasan simply overshadowing Rishi Kapoor in Saagar was enough to boycott Kamal as the entire Bollywood got sleepless over an outsider taking over their kingdom.
Would the scenario remotely be different for Prabhas? No way. It is this generation's chance to realise the ugly truth.