PS -2′ trailer shows Aishwarya’s Nandini promising to finish the Cholas

The trailer of Mani Ratnam's upcoming epic period action film 'Ponniyin Selvan-2', which was unveiled at a glittering public event in Chennai graced by Kamal Hassan on Wednesday, is all about Arunmozhi Varman, who became the mighty Chola emperor, Rajaraja I.