I think there is strong possibility of Aamir Khan production films shifting to viacom18 very soon
Regarding Excel Films and Reliance Entertainment owned films i think star / disney might get these onboard though viacom18 too has some chance.
Sippy Films will remain divided between goldmines (self owned), zee or star (lionsgate owned ones) and those co produced by Fox Star/Sippy Films will remain with star/disney
Incase venus films agreement with star/disney is not renewed, these will most likely shift to viacom18.
Emmay Entertainment and JA Entertainment films will remain across various broadcasters bcoz these owned by either emmay entertainment themselves who has deals with multiple broadcasters or other films of their and all films of JA Entertainment r with various studios or library companies which have agreement with their own broadcast network or other broadcasters
In my understanding, there is also a case where initially rights of films r owned by studios like it happened with Ye Jawaani Hai Deewani which was distributed by UTV but later Dharma Production got back the rights and finally viacom18 renewed it
Too much complexities involved in correctly analysing how previously satellite or digital rights agreement happened or what is likely to happen in future