Ramanath is seeing Shravans downfall. It might reach a point, may be somewhere after bachelors party drinking or so that Ramnath will realise that only sumo can bring back the old Shravan. I would love to see Ramnath go to sumo and remind her of the conversation after the late night hug( I know that's way too high expectation. I don't mind being a POPAT ) Mostly I think, He might emotionally blackmail Nirmala in the name of Shravan to cancel sumos wedding with adi. Remember he is the only one who knows both like each other. He might reveal the truth and tell her to call off the wedding.
I believe Adi and Nirmala are here to stay, atleast until the MU between Nirmala and Shravan are not cleared. If Shravan and Sumo marriage happens, there is very little scope for them, why will they stay back. They will leave. Only chance if Adi turns negative for revenge on Shravan.
If adi and sumo marriage happens : this will be a dead end. I don't think creatives will take this risk. So no
The only way is no marriage, and Adi realises why his mom called off wedding and for what reason. He tries to clear MU between Nirmala and Shravan. Only Adi can do this because everyone else is too righteous 😉 to lie to anybody. In this case speaking truth is not going to yield anything.