Prabhas bigger than SRK and Salman Khan?
Prabhas is the only Indian Hero, who is doing back-to-back 500 crore films. He is facing no sort of production, control, or budgeting issues;

There was once a time when Bollywood superstars, including Salman Khan and Shah Rukh Khan used to absolutely rule the Indian cinema industry with their dominance. But that is not even remotely the case now with Tollywood stars becoming big deals in the Indian circuit.
Coming to the topic now, Bollywood superstar, Salman Khan revealed in a recent interview that his film with Atlee got cancelled due to budget issues. Salman Khan implied that the budget that was proposed for the project was beyond comprehension, and that is why he did not happen.
Back in the day, not many projects would have been enough not to afford Salman Khan. But in the current day era, producers are thinking twice before investing money on a project, regardless of the star power of the Hero.
Another crucial point that must be noted here is that while superstars like Salman Khan are struggling to bring big budgets from production houses. It is interesting to note that Prabhas is continuously doing big budget films.
Prabhas is the only Indian Hero, who is doing back-to-back 500 crore films. He is facing no sort of production, control, or budgeting issues, even after delivering so many big stakes projects.
Perhaps we argued that no other star in Indian cinema is as big as Prabhas, when it comes to being able to generate such revenues for his films and continuously do largest scale productions.