I don't even see the appeal of Borat. It doesn't look much different than Jamie Kennedy Experiment or Candid Camera. It's the exact same schtick -- "comedian" makes people uncomfortable and they say and do stupid things. WOW -- he are original. Yet all the geeks are playing sophisticated by saying Borat redefines comedy, and that he's a visionary. No and No. He made a reality show mixed with a candid camera show, both of which are over 10 years old.
The only asset he had is that "Borat" was unknown before the movie. Now that it's known that Borat is fiction (and since the DVD of Ali G is available in the US) he isn't going to be able to get this stuff as he could in Borat.