Amarillo thought he had encountered the Gamma-V at first (which was more of a joke for the purposes of that comic, anyway), but then he saw UFOs and was shot down. Maybe I haven't made it clear, but I will in an upcoming storyline about Amarillo and the UFOs.
As for Date Night, I do plan to wrap it up by the end of the year. I've been in the mood lately to tell a few shorter tales starring characters that I feel I haven't done enough with: Scouse, Magnetica, Galanos, Ronald and Mr. Wobbly Droid, the Ice Queen, Red, Churchill, Amarillo, the Shakespearean Dragons, and the Spadowskis. There are other characters that haven't appeared much lately (the Gemini Twins and Captain Dash, for example), but I haven't forgotten them.
Batbrick, I'm glad Captain Amarillo's dialogue reminded you of a 1950's comic book character. The basic inspiration for Amarillo was Kenneth Arnold, the pilot whose sighting of UFOs in 1947 sparked the whole flying saucer phenomenon. I liked the idea of a well-respected, well-spoken pilot who talks honestly and plainly about what he saw, and added in the idea of Amarillo being a classic, straight-jawed hero.