Hello,
Before going to to the function that they have shown in the promo: I think Dishaad has plans to choose Zoya as her DIL ( She knows Asad likes someone and she loves Zoya, She and Najama want someone like Zoya in Asad's life who can stand for themselves in front of him yet very sweet, caring and selfless around other people. She has witnessed numerous times how Zoya helps other people despite getting all the blame on herself / getting herself into trouble( Mariam situation/ Meeting of Asad and Ayan from hospital/ how she saved Najama from college gundas/ how she saved Dilshaad from gunman who came to kill Dilshad and how Zoya went to Ayan's sagai so that Asad can see it etc). After knowing Asad's view on sagai and seeing ring on Zoya's finger she knows Asad has feelings for Zoya otherwise he would not have put the ring on her finger openly in front of all the people on the airport as a part of drama as Asad says.
That is why we see the dress that Dishaad has made for her DIL is the one that Zoya is wearing.
Dilshaad wants Zoya to be her DIL.
The only possibility that I can think where she might select Tanveer is on the fit of frustration/ anger and challenge on the instigation of Sheerin's words where she decides to get Asad married in 10 days. And Since Sheerin might make Dilshad more furious by accusing/ insulting her more that she is the one who sent Zoya to give poison to Humeira. So just to prove Sheerin wrong she deliberately will choose Tanveer.
I am still so sure that Dilshaad will choose Zoya. We see in the promo that Dilshaad is pointing between Zoya and Tanveer and Tanveer smiling but who knows when we actually see the episode, we will see first she will point her finger towards Tanveer making Tanveer very happy and then slowly moving towards Zoya and pronouncing the name Zoya. That is how pre caps are to increase more suspense..