I don't think Bidaai will do that. I think they will show that it was Sadhana's love and support that "healed" Aalekh with the help of Ranvir and Ragini.
I think after Aalekh gets better or starts to get better, the Rajvanch family is going to be a mess as the entire mystery behind Dadaji's death and everything will come out and why he hates Vasu, etc.