So this is what we have so far it appears.
1. French Polynesia
2. French Polynesia
3. New Zealand
12. USA (obviously)
Theories I have for legs 8 and eventually 11:
a. Second leg in Botswana, other country in Europe
b. leg in South Africa/Namibia, second leg in Germany (i hope )
Here is my guess:
1 French Polynesia
2 French Polynesia
3 New Zealand
9 Switzerland & Germany
11 London England
It's not very likely for London to be visited again because of the season 7 and season 17 surrounding areas route. My theory is leg 11 will take place in Scotland agreeing with topaz, the last time teams visited Scottie was in TAR3 after reading the route on Wikipedia and it was only in Stonehaven, barely any Aberdeen except for transportation services. There's so much more of Scotland to uncover.
As for the mystery Botswana? leg, very likely as there was barely any information about the 8th leg. If it went to Switzerland, at least one person would have social networked about a sighting in a total of three to five days than a one leg visit. Rural leg habits.