If we observe the nuances of film industry in general you can easily understand the importance of multi-starrer films.
Recently a new speculation started doing rounds across the filmnagar that Mahesh & Balakrishna are going to team up with Rajamouli for a multi-starrer film. This speculation got huge mileage across the Telugu film lovers and with their respective fans as well. However this speculation was turned down by the sources close to the both heroes.
Mahesh and Rajamouli have an earlier commitment of doing a film together but it will not be a multi-starrer film, as per the sources. Even sources close to Balakrishna also clarified that there is no such plan of working with Mahesh or Rajamouli as of now.
On the whole, this big multi-starrer rumor turns out to be false.