Personally, I don't think so...
I think she will come for short cameos, such as for the 2nd Aug special episode, wherein she will help move the story along.
In this case, she is revealing to Tunveer that S is AAK and Zoya's daughter; in another instance she may provide some other story-changing pivotal point.
As you can see, the fever was high up until the wedding...now even the forum snoozes because nothing is really happening...the brothers are feeling bad, S and ARI are having cutesy fights and everyone else is just waiting...as we all are.
Ruzia will deliver that much needed change.
The actor is already signed on to work in another show for another channel, so I definitely feel she won't be back full-time.
If she does come back full-time, I hope she acts as foil to Tunveer and not as an accomplice.
Jayne