do you prefer to start with • a team/society/organisation who has been estabilished by some time, and the story is just one of their mission, of which there have been others previously in the missing year, "offscreen" • the actual gathering of the character around a reason to exist (a menace require gifeted people to band/ an organisation-governement-corporation enlists gifted people to perform a mission.
Personally, I prefer the second, as the interaction of the various character would be born much more naturally.
