Kyunki intro hasnt been changed because those characters havent left the serial think of it this way. have Tulsi + Mihir remarried? well....um....no...i think but also if u c Hemant and Pooja have been mentioned a lot we know they exist for Sahil calls Tulsi badi ma and some like Gayatri once also says Sahil isnt even Tulsis son. and with them all known to be where they r like Prajakta + Chirag in London and Hemant + Pooja in Australia do u really think Ekta will let them go just like tht i mean Hussein is going to leave Kumkum soon Tuhinaa will leave Satthi Re. Prachi is tired of doing dancing because those ppl dont want to do classical indian dances. Ketki wants to return too. so then it adds up to Kyunki. I mean when Mihir gets married to Tulsi again dont u think the family wud be there to c it it all is a bit fishy to say those characters rnt really there i think we might be witnessing comebacks all the time Banvri came back rite but....left so u knw😃