Hera Pheri is an iconic film. Period. Its cast is perfect as it is.
It is a cult classic.
No other actor could have done Akki or Sunil's role in it or Paresh or Tabu or Om Puri's role in it.
SRK has no comic timing compared to Akshay whose comic timing is easily one of all time bests in history of Indian cinema.
Waise bhi SRK rarely does roles of struggling, unemployed man or someone living in a chawl. He mostly plays rich NRI roles and was typecast in such roles in 2000 when Hera Pheri released. He is a misfit for any role in Hera Pheri or any comedy film in general.
BTW, Akki has no heroine opposite him in original Hera Pheri. So how could SRK do such a role? He'd have likely chosen Sunil's role as it atleast has romantic song and scenes with Tabu. I do not think he'd make do with one fantasy song that Akki did with Namrata in the film but remain as lone guy and dance with only old Paresh Rawal in the original.
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