It wasn't made to be sold (there is no price), so I assume it was a giveaway of some kind, but it's kind of mysterious. Since I added it to the GCD, someone else has added four more issues, and it looks like Disney did this with some Aladdin and Beauty and the Beast comics too. If anyone knows why these comics exist and how they were distributed, please let me know!
Recent cover scans I added to GCD:
Marvel New Stories/Road to Civil War II Previews #1
Rick Geary: The Lampoon Years 1979-1992
Uncanny Adventures: Duo #3