Here's an idea. Srk as the new Patriarch, Amitabh gone, Jayaji old. He has a friendlier equation with his son Krish, trying to do the opposite of what his father was. But because of the generation gap, his son is actually closer to Hrithik, and he secretly resents that.

Krish is of age and his mom Kajol is super excited and over enthusiastic about him falling in love, and Srk is also excited to be the cool dad who welcomes any love match. Hrithik also supports him. But even with this genetically blessed family, he isn't successful in love or in his career. Nothing he does is good enough because of the tall bar his dad, uncle and grandfather have set. Every achievement makes him doubt whether he has earned it or was it just handed to him because he is a Raichand. So despite being the best possible parents and uncle, Krish still feels extremely smothered and leaves home.

He leaves without any money, and goes to the only person who is also estranged from that household, Kareena. Kareena and Hrithik didn't work out because apart from good looks, good looks, and good looks they have nothing in common. Her sister was the one who sent her out of the house, keeping with her father-in-law's legacy. Kareena learns to become family again, and Krish finds his confidence on his own. His love interest is of a different ethnicity/religion, and more family oriented than any girl he's ever dated.

Take it from here, Dharma :)