I still remember the days of 'Kuch Kuch Hota Hai', 'Dilwaale Dulhaniya Lejaayenga' and 'Dil to Paagal Hai'... these flicks are top favorites of every movie buff who loves to watch love-romantic entertainers.
Of course, these films made Shah Rukh Khan, B-Town ka 'Baadshah'... almost for a decade, there was no other Actor, who could beat Shah Rukh.
But, Shah Rukh started experiencing a downfall, once he started experimenting with his image and roles... no 'Don', 'Ra-One', 'Don-2' could get that 'success' back for him.
Shah Rukh's decision to get back to his 'romantic hero' ka image, working in 'Jab Tak Hai Jaan' even did not work positive for his career in any way... the audience did not accept the 40+ years old Hero as a 'lover boy'.
And yes, I am thinking the same as you are... 'ab shah Rukh kya karega'.