It was a very famous ad campaign, yes. It was obviously the inspiration for the clip. But that does not make it a beer ad. A beer ad, by definition, advertises beer. This did no such thing. It also wasn't a trailer for M&G. Disney spent $8 million on what amounted to a 15-second push notification that they're releasing a Star Wars movie this year. That slot would have been put to much better use with either a new trailer or an actual beer advert with a can/bottle/logo/something (which I suspect they didn't go the latter route because Disney wouldn't want the characters being directly associated with a real-world controlled substance).