CONFUSION!!!!

i have been a silent observer on this forum for sometime now but today i just could not stop myself from writing this post. I have this huge confusion regarding this show which i hope someone will be able to clear!!!😲 The confusion is--------

DURING THE PROMOS WHICH WERE SHOWN BEFORE THE SHOW BEGAN HAD AALIYA SAYING THINGS LIKE 'INTEZAAR THA ISS DIN KA KABSEY...' . THAT'S JUSTIFIED SINCE SHE IS GETTING MARRIED TO ZEESHAN SO SHE MUST BE TALKING ABOUT THAT...BUT THE PROMO WHICH WAS FOCUSED ON ZAIN HAD HIM SAYING ' BEKARAR DIL THA ISSEY DIN KE LIYE ..CHAHATH THI UNKO DEKHNAYE KIYE KABSEY...' ...WHO IS HE TALKING ABOUT???...IS THERE GOING TO BE A NEW ENTARANT IN THE SHOW FOR ZAIN (IN A CAMEO ROLE)...OR IS HE JUST TALKING ABOUT AALIYA'S WEDDING ?😕