Just one level at a time.
I hope someday they might allow a longtime user to have accelerated advancement (Coach joining a World he has never been in, but several thousand overall games). I mean he can go D3, D2, D1AA in only three season, but once he reaches D1AA, he has limited access to D1A. Smaller Conferences and the like. Nobody would get to an elite this way, only to D1A.