Taking on a role like Wolverine could do the same thing for him that it did for Jackman, turning him into an international superstar.
Khan is actually three years older than Jackman, though, meaning that if he did start playing the role, it probably would not be the story of a younger Wolverine.
But no one knows better than Jackman what is required to play Wolverine.
That said, it remains to be seen when – or, if – another actor is cast as Wolverine in Fox’s X-Men franchise.