When you go to a movie in towns like LA, Seattle or the Bay Area, you can always tell which people work in the industry because they are the only people who stay to watch the credits. Normal humans all leave when the credits start to roll, with a tiny fraction staying in the hope they include a teaser or surprise bit of story in the middle of the credits. Since the producers of the Alien revival had just spent all their money on the interview, they want to make sure people see it, so they put it before the film.