I think kv told I am getting married to shagun or anokhi. In interview also he just told some relations will change but didn't mention whose, Epic moment etc he uses this kind of words. In live chat he just joke ahir will fill babli's mang that but didn't spill they are going to stay together. I don't know what he told in watch party but in interview he just gave hints and I think that is ok. From stating many actors share BTS. I think yesterday dancing pics were leaked by troop dancers (just my guess).
I don't think that even KV likes to reveal certain spoilers or plotlines but fans are too dominating and hence, he gives few hints and BTS videos after every 3-4 days ... I hope KV doesn't give in to their impulse anymore