First of all, i don't mind if he's positive but there are already too many positive characters in the show now with Tai and Pyaare in Jail. Also, he gave away weird vibes while talking to Survi. So i think apart from Iccha, he could be negative too and maybe infact they both might be connected.
However, I can't think of a motive if Aniket is negative though.. 🤔
He won't be taking Tai's revenge for sure.. I mean he was the first one who went against Tai and threatened to expose her. Revenge from Kartik could definitely be a motive. Aniket might blame him for 'stealing' Survi and I kinda felt that this could be the scenario when Aniket talked to Survi in the last scene. He could easily try to use Kartik being afraid of Iccha as an excuse to create distance between Karvishi and take Kartik's place in SuShi's life (however, it won't work.. for the obvious reasons). But then again, why would he wait for so many years? He could've tried to find and get Survi while she was separated from Kartik. Also, he himself told Kartik to carry on with the relationship. So there's a 50% chance that Karvi separation is the motive 😕.
It would be very interesting if it turns out to be a whole another reason because i can't think of anything else.