Confirming the speculations, Allu Arjun - Koratala Siva project was officially announced a short while back. The makers had also released a concept poster of the film.
The concept poster is an intriguing one as it portrays dark visuals and has a spooky vibe to it.
Allu Arjun's close friends, Sandy, Swathi, and Nutty are co-producing the film while Koratala Siva's friend Sudhakar Mikkilineni is producing it.
The film is likely to hit the floors next year. Allu Arjun and Siva are presently busy with Pushpa and Acharya respectively.
AA21 is a pan-India project and it will be made on a big scale. More details about the project will be out in the near future.