Diwali premiere Clash
Sony - Haseen Dilruba
Disney-Star - Mimi
Zee - Toofaan
All the films are premiering on the same time at the same day. Zee actively used to avoid clashes but this time they have stepped up into the game.
IMO Mimi will be the obvious winner, while Toofaan and Haseen Dilruba will fight for the second spot. If Viacom18 decides to premiere Shershaah then Mimi will find a tough competition
Seeing this scenario for Diwali predicting premieres for other festivals
Christmas
Sony - Bell Bottom (Dial 100 and Helmet most probably will premiere on Nov-Dec)
Zee - Thalaivi
Disney-Star - Bhuj or Hungama 2 (most probably Bhuj will premiere since Hungama 2 will get aired in between Mimi and Bhuj)
Viacom18 - Shershaah or a dubbed Premiere
Republic Day
Zee - Sooryavanshi (if the Diwali release goes as planned)
Sony - Sardar Udham
Disney-Star - Hum Do Humare Do