Why Katappa killed Baahubali was a closely-guarded secret, even on sets: Director SS Rajamouli

Director SS Rajamouli says that for a long time, very few people knew why Katappa killed Baahubali in the first film of the franchise.

Doesn't look like the Baahubali fever will ever die down. The first film, Baahubali: The Beginning(2015), created enough hype and mystery with its cliff-hanger ending, where Baahubali's trusted servant Katappa killed him, in a shocking twist.
Till the second film, there was one question in everyone's minds: Why did Katappa (Sathyaraj) kill Baahubali (Prabhas)? Though they got the answer in the second film, Baahubali: The Conclusion , SS Rajamouli now reveals that very few people knew the real answer to the question.

In a recent interview, the director was asked, "How many people knew the answer to that question 'Katappa ne Baahubali ko kyu maara?' And was it hard to keep that secret?"
He answered, "When we talk about why Katappa killed Baahubali, it is not such a difficult question to answer. If you just look at the film twice and put a little bit mind to it, the answer is evident. Even when people were tweeting to me, there were many people who got it right. But the actual question is not why Katappa killed Baahubali, what they mean by that is how Katappa killed Baahubali, you know that is what people are actually asking. How could he do it? And that answer is not easy to guess."
The filmmaker said that it was a closely-guarded secret on the sets as well."Very few people, maybe around 10-15 people would have known the entire story," he said.

The Baahubali franchise starred Prabhas, Sathyaraj, Anushka Shetty, and Rana Daggubatti in the lead roles. The film broke all records on the domestic, as well as on the international front.