Or just a few (if only one or two) more Eiger/Chamonix "Arena"'s, same location but many tracks. Combined with a few more rally themes in the track generator and job done, you have the base for a decent rally championship, for online and A-Spec
Dropping some ideas:
Highlands (Gravel) (think Rally UK, a mix of forest and open areas, a few small jumps)
Finland (Gravel) (obvious, isn't is? A good amount of big jumps)
Col De Turini (Tarmac) (Mountain roads with an extra track generator option - ice on track)
Outback (Gravel) (actually just Liege with altered scenery and a few more jumps)
Sweden (Snow) (same as Outback, but Alaska)