That deal cancelled bro
There was no deal between Varun Dhawan and Star India, Judwaa 2 rights were procured bcoz movie was produced by Sajid Nadiadwala and distributed by Fox Star. It was more of a case like the movie Sanju where despite deals between producer/actor and channel , certain movies r out of the ambit bcuz of mix of reasons. In actual zee has agreement with Varun Dhawan since 2013 or so.
Stars acquire movie rights from producers but producers keep some rights for themselves which is why Judwaa 2 or salman's YRF movies air on channel other than which they have agreement with. Even War would have gone to Sony had Star India not stitched overall pact with YRF, though Hrithik has exclusive contract with Star/Disney