Much of what Amir's value is has to do with memories.
Indians have a lot of time for Amir because he has performed well against them. English too because of what he has done in England, though not so much against the English. But other countries may think what the big deal is. Afterall his stats, apart from T20s, are OK, not world beating.
Similarly, Pakistanis respect Sehwag a lot because of his performances against them. Does not mean other countries will rate him this highly.
On the opposite scale, Indians may not care about Akram as much as Aussies do, or Pakistanis may not about Tendulkar as much as many other countries do.
People remember the fear they get from an opposition player for a long time.
So Amir has a great chance to be part of IPL if he qualifies. I am just not sure he will be a success.