It is a known fact that NTR is doing a film with Koratala Siva. As soon as he finishes RRR, he will jump on to this project which is an action drama.
On the other hand, Koratala Siva is busy with Acharya and is yet to complete the shoot. The project has been delayed so many times and Koratala does not want this to happen with the NTR film.
So, the word from his camp is that Koratala Siva is busy with solid pre-production and wants the film to be wrapped up in just six months.
For all this to happen, it needs massive planning and Koratala has already started working and is also done with most part of the casting.