I Honestly thought the outfits would be something you got from buying that game. Like an item code or something. Silver lining is that it's at least not FOMO. Though I would have done a little crossover event.
Just a quest and a cutscene where you act in a play held in the Prima Vista with the reward being Gaffgarion's outfit. The other outfits would be coffers at the Saucer you can get after doing the quest.