Anil Thadani is the distributor. Plus they have paid hefty to Sanjay Dutt already. Without any other big name except Yash, KGF Chapter 1 was the costliest Kannada film ever to be made. Now that it went Pan India they had to up the game. And ofcourse casting Raveena is still fine, she isn't playing a Kannadathi but Sanjay's character is proper kannadiga & they are gambling big time.
I don't mind saying it or accepting it, Kannada cinema gets actors/actresses from other industries only after they have lost their markets there. The only person who got them on their prime was V.Ravichandran because he paid them high & literally nobody could say no to him. Be it Juhi Chawla (ofcourse he gave her the first blockbuster & even after QSQT she just didn't blink doing more movies with him), Khushboo, Moon Moon Sen, Poonam Dhillon, Amala, Radha, Rajinikanth, Amjad Khan, Chiranjeevi, Shilpa Shetty, Meena, Roja, Rambha, Nagma, Ramya Krishnan, Madhoo, Aruna Irani etc.. I am talking from the late 80s. But now, he is not who he used to be.