Prabhas upcoming movie title confusion: Baahubali

Every one is awaiting for prabhas next movie Baahubali.The movie name was making confusion Which may change to Mahabali because recently the producer registered to tile Mahabali at film chamber.
Whats the secret behind this,Is Mahabali a sequel movie to Bahubali or

 Bahubali title name is replaced with Mahabali ?