Route Possibilities I see
If cuba was 2 legs:
Leg 8: non-elim (5 teams left)
Leg 9: Kor
Leg 10: elim in Sydney ( 4 teams left)
Leg 11: elim in New Brunswick(final 3)
Leg 12: Montreal finale
or
Leg 8:Kor (5 teams left)
Leg 9: non-elim
Leg 10: elim in Sydney ( 4 teams left)
Leg 11: elim in New Brunswick (final 3)
Leg 12: Montreal finale
If Cuba was 1 leg:
Leg 8: Kor (5 teams left)
Leg 9: elim in Sydney ( 4 teams left)
Leg 10: elim in New Brunswick (final 3)
Leg 11: Montreal finale
Leg 8: non-elim(5 teams left)
Leg 9: elim in Sydney ( 4 teams left)
Leg 10: elim in New Brunswick (final 3)
Leg 11: Montreal finale
Keep in mind that because we started out with 10 teams, we need 4 non-elim and/or kor legs to reach 12 legs. So if Cuba was 1 leg that was either a non-elim or kor and there going for 12 legs, it is possible the New Brunswick leg was a non-elim and leg 11 was Montreal ( matching the tweet sighting of 4 teams).