My bet would have been Suresh, but the only thing that does concern me is the fact that Faisal has decided to quit due to the development the character.
If he was to be the father then surely he would have had the screen space and would have been aware of this- so why would he quit. I also feel that Suresh will become negative in the future but who knows.
I don't think it will be Puneet.
I think it will be a producer/new entry if its not Suresh.
Highly doubt it will be Neil.