I have a theory. This will go KZK way more than Rishta gen 3 way. 
This new guy RK whatever will initially be towards the grey side and eventually will turn positive with Abhira around him, becoming Abhira’s AA and will be her support. I think first abhimaan will reconcile because of this guy. He’ll help them reconcile. Abhira and this guy will become good friends and a support system. 
 Armaan won’t like it. Once reconciliation, some intimate scenes of abhimaan so later she can get pregnant. Armaan will be jealous of Abhira being friends with this guy. He’ll be insecure .. abhimaan will have issues because of it. 
Abhira will get pregnant. She’ll tell Armaan and he’ll question her whether the child is really his because of his insecurity (happened in rishta 2 where kartik questioned naira). Then Abhira wouldn’t be able to take armaan questioning her character hence she’ll leave him. Tab maybe that divorce paper will come in handy where both have signed the papers so technically they’ll be divorced. 
Abhira will leave udaipur and Goenka and Poddars and with the help of this RK guy will be shown raising her kid alone post leap. RK will be in love with her. This RK guy will become abhimaan’s kid’s father figure. 
At this time, maybe Rohit would have died and Armaan has become Ruhi’s kid’s papa figure like Manyu. Poddars might convince him to marry Ruhi because Abhira is gone and won’t come back. 
Abhira on the other hand will be grateful for RK for his support and might say yes to marry him and get engaged. 
1.2k