grodog
Hero
Using the Greyhawk 1e module S3 Expedition to the Barrier Peaks would be a good start in the futuristic direction. The saucer could even be a detached command module from a destroyed/separated/alternate universe Enterprise, if you're so inclined 
If you have access to the Dragon Archive CDs, also check out The Dragon #17, which has an article by EGG called "Faceless Men and Clockwork Monsters"---it details the misadventures of a bunch of adventurers beneath Castle Greyhawk who were thrown onto the Starship Warden (from the TSR game Metamorphosis Alpha, the 1976 precursor to Gamma World) via a cursed scroll. A few issues later there's a conversion article (there's also info in the 1e DMG for doing Gamma World :: AD&D conversions).

If you have access to the Dragon Archive CDs, also check out The Dragon #17, which has an article by EGG called "Faceless Men and Clockwork Monsters"---it details the misadventures of a bunch of adventurers beneath Castle Greyhawk who were thrown onto the Starship Warden (from the TSR game Metamorphosis Alpha, the 1976 precursor to Gamma World) via a cursed scroll. A few issues later there's a conversion article (there's also info in the 1e DMG for doing Gamma World :: AD&D conversions).