I'm 100% sure how this could work since "Scotty" is dead, BUT I'm thinking about that scene from Star Trek IV where Scotty is trying to talk to the 20 century computer. He keeps saying "Computer?" And getting no responce. So they use stock footage of that scene and then have Siri answer "Yes Mr Scott" Then a scene from the movies or from the TV series where he says "they call my Scotty" or something similar, and then Siri responds "Ok I'll call you Scotty" Then the screen blacks out and the words, The future is now! appear on the screen.
I'd rather they not use celebrities in their commercials at all. Apple's advertising, as far as commercials
are concerned, absolutely sucks. The closest Steve Jobs let celebrities in Apple commercials were the
iPod commercials. Like Bob Dylan. And at was it.