Hey Rosh here is my take on this:
Kismat=AsYa
Apno Ki Khushi:
Zoya's Khushi=Asad
Ayaan's Khushi= Humera
So khushi is definitely not zoyaan.
What this dialogue IMO preludes to is Gaffur hungama.
Remember how Asad broke the musical box by mistake. Unfortunately due to him, Zoya and Gaffur relationship will be broken but AsYa will be together (the dancing dolls were together)...so AsYa are married but Gaffur does not accept Zoya because of his izzat and because she is married to Asad or he makes her choose and she chooses Asad...so because of Asad the relationship is broken...this hurts Zoya tremendously and she is sad that she cannot connect to her abbu...so Asad himself mends the relationship...he goes to SM...just like he fixed the music ball...but AsYa are still together...now when Gaffur makes Zoya choose...she will go only and only to Asad...and then one day Gaffur will come begging to her...
So even though Asad will not want Zoya and Gaffur to have a relationship after he rejected her...for Zoya's happiness he will have to accept destiny and have a relationship with Gaffur.
Also, Ayaan being the whole flirt thing...remember how everyone thought he was enchanted by zoya and what not...well here you go...he is not a flirt anymore...all he wants now is humera...i choose to interpret it in this way...at a point in time he did flirt with zoya and was desperate to meet her...then in holi he said he does not want this musibat for him...and today we see that he is not the flirt he use to be anymore because he only belongs to humera now...i don't think his love for her is that shallow that he will think he loves zoya...especially after how nikhat narrated it today..
Also, both bro's don't like Haseena...i doubt they will clash again over her family. I really feel they both will beat up Imran together.
Like i said yesterday Zoyaan may just be a plan by all the kids to expose the 17 yrs ago conspiracy...none of the kids may be happy about it but they will go through with it...to give justice to those who deserve it and punish the culprits.
Why build up AyRa and AsYa to such amazing parallels to break them apart. IMO the next tracks will be more bro clashes with Zoya and Humera being on Asad and Ayaan's side and also working together to mend their relationships.
The songs won't be a dream. Forum 32 captioned one picture as "the promise"