Ok this is my take on the future of Jai and Bani. I think Bani and Jai will come closer only this time the catalyst will be Krishna and Atharv instead of Massi. Although Bani will still keep trying to focus on her revenge but I guess just when her one month deadline is about to be up and she has succeeded in almost ruining him completely his truth will come out. She will realise how much Jai loves her that he had done everything in order to save her from her own snake of a sister. And then Bani will again be at crossroads of her life.. whether to stick by the man who sacrificed everything in order to save her and protect her .. the man who loves her to death or the man who saved her life and gave her a new identity and filled her with hate against her own family and then wanted to marry her without telling her the entire truth. Basically I still think AD is using Bani for his own revenge he knows bloody well that Jai was innoscent and loves her to death.. he also knows how much Bani loved Jai but despite that he is not telling her the truth.
I hope jai eventually gets his happiness with Bani he really loves her. I feel bad for him... I still maintain that if Bani goes to AD I will not be able to watch the show ... for me KS is JB and thats it... NO AD-Bani pairing no AD-DDG pairing either.