Rajan intially wanted to destroy Gen 2 by Gen 3 and 4 Love triangle

Mohsin Khan said, "I think nobody knows but Kartik ka bada bhai bhi tha. Toh jo mera pehla mockshoot tha woh tha with Naira and Kartik ka bada bhai. So, I think, the bada bhai was supposed to be the hero later. So, they told me that there are these two characters; Kartik who's this cute, bubbly guy and his elder brother who is this strict man who hates his father and has gone abroad for studies aur woh bahar se aayega. Toh maine bola mai Kartik ka mockshoot duga kyuki mujhe yeh pasand hai so woh karke mai nikal gaya."

Mohsin wanted to play Kartik, irrespective of whether he would be the lead or not. Later, the makers scrapped the elder brother's character from the script and the story revolved around Kartik and Naira as leads of the show.

So imagine what they couldn’t achieve in s2 and s3 ,will be done in s4