I have a suggestion for a future Pathfinder expansion, its my idea, so my suggested name for it is Pathfinder SF, it uses the rules for Pathfinder but applies them to a Science Fiction setting. All that really needs to be done is to add a bunch of Science Fiction character classes, Release a Pathfinder SF Beastiary and list the additional science fiction equipment items. I think the gaming mechanics could be identical to Pathfinder core.
I wasn't particularly thrilled with d20 Future. I think the core characters classes named after the ability scores they featured were a bit one-dimensional. A better example to follow, would be the Traveller T20 game, but that's geared towards a very specific setting. In the process of creating a D20 game for the Traveller setting, they created a list of character classes, modeled after Traveller Careers, turns out this is pretty "D&Dish" with the exception that they made some of the weapons excessively deadly to compensate. The list of SF character classes I'd include would be Barbarian, Engineer, Merchant, Noble, Rogue, Scout, Mercenary, and Scientist.
