Devi superstition is not in kd. That precap scene is before fecilitation episode. After fecilitation she will get to know about shruti being Mrs. Chavan in hospital as shown in promo. And mohit seeing virat in hotel is same as kd.Okay, so a question.. Did they have the Devi wala superstition in KD?
If no, then I think the promo is just to tease us... because Devi is standing there when Sai says this.. so she will once again start her crap about SaiRat separating and one of them getting hurt.
Also, like you all said, family supports Sai. So Ninad saying I am with you might be a hint of that.