Recently in an interview Prabhas talked about a question. He faced a question "Why did Kattapa kill Bahubali?" Many times. Everyone asked him the secret about the question. A person particularly asked the question many times.
So, Prabhas answered the secret will be known in Bahubali 3. With his answer the person got shocked. Then later Prabhas said he just joked the secret will be revealed in Bahubali 2. He also said the war scenes with Rana came out really well.