Ram Charan's character in 'Rangasthalam' first saves Prakash Raj's character, only to kill him in the climax.   Writer M Gandhi has alleged that the element was copied from him.  

Responding to the allegation, Sukumar has written a long letter to the Telugu Writer's Association.  "Neither I nor my producers (at Mythri Movie Makers) have ever met Gandhi.  As such, there is no way that we could have lifted his ideas.  The element of the hero saving first and killing the villain later is entirely my idea.  I was inspired by the film 'Dharma Yuddham' in writing the scenes.  In the said film, the way the hero punishes the villain has deeply influenced me.  When the villain is too powerful, or when none can give him just desserts, or when he is too influential, the victim becomes the judge and the jury," Sukumar explains in the letter.

He elucidates the climax of 'Kumari 21F' without taking the name.  The film too had a similar idea based on the formula of the victim becoming the renderer of justice.  While punishing the offender this victim behaves like the court and even lets the perpetrator to let know of his last wish.  In 'Rangasthalam', the hero waits for the sinner to completely recover from ill health and then kills him.

"The formula is the same for many writers, but the way it's told differs creatively.  Everything said, I wouldn't claim  what I have shown in 'Rangasthalam' is entirely novel.  Sydney Sheldon's 'A Stranger In the Mirror' and the Hindi movie 'Anjaan', too, have similar ideas," Sukumar submits.