Ironically, it seems like every major series I've gotten into at one point or another has ended up in UF. Star Trek, Babylon 5, Battle Angel/Gunnm, Read Or Die, Black Lagoon, CSI, and most recently Mass Effect. And those are just the overt cameos and elements, we're not even talkin' the tips-of-the-hat and the small items here and there, like Rad-X and the Jackal (the "smaller" of Geoff Depew's original pistols).

Think the only universe I'd like to see in UF that hasn't appeared yet is Bioshock. Some elements fit the UF universe so well (Art Deco architecture, Dieselpunk elements), while others would be hard to explain (ADAM/EVE, plasmids), and others would seem downright silly (audiotape diaries, hacking being a "new" concept). Plus so much of it is a sort of set piece, with Ryan's motivation for establishing Rapture being to get away from "Bolshevism" of FDR's America, as well as the sort of social/economic/scientific drives of the post-WWII era.

Funny, here I am saying I'd like to see it in UF, yet thinking up plenty of reasons why it shouldn't be. Things that make you go "Hmmm..."