Predators have been interplanetary hunters through history and probably many millennia into the future.
Some new maps could take palace at different times. For example Aztek/Mayan times, the future, ancient Japan or china or the turn of the century in the US or Europe for example.
Customization and weapons would be an issue for the FT. Possibly preset loadouts and looks depending on the maps to be cohesive.
This concept is probably more difficult to implement though. Anyway I think it would be cool and could add variety.