This is very similar in approach to the ads for the first Vacation movie. Completely different actors playing the children, but that’s to be expected. It’s also important to note that National Lampoon was still the parent magazine for Heavy Metal at this time, so it’s not unusual for ads for NL’s movies to show up in this publication.

(Heavy Metal issue #100, July 1985 – Inside Front Cover National Lampoon’s European Vacation ad)