Pirates were, are, and ever wil be cool. Are we seeing a bit of overkill at the moment ? Yeah, but even overkill can't make pirates stop being fun. Which just goes to prove that it's a winning concept.
I think we can expect the pirate stuff to stick around for a good long while.
I had something else to say on the subject that was very deep but of course I forgot it the moment I went to type it :/