I'm personally digging the idea of having Latin America at the end of the race (and not just for one leg, either).
12 teams, 13 legs
Leg 1: Los Angeles, U.S.A. to Reykjavik, Iceland (EL- 12th place)
Leg 2: Reykjavik, Iceland to Rome, Italy to Vatican City (Fast Forward; EL- 11th place)
Leg 3: Rome to Naples, Italy (EL- 10th place)
Leg 4: Naples, Italy to Budapest, Hungary (Switchback; EL- 9th place)
Leg 5: Budapest, Hungary to Addis Ababa, Ethiopia (Double U-turn; EL- 8th place)
Leg 6: Addis Ababa, Ethiopia to Agra, India (KRL- 7 teams)
Leg 7: Agra, India to Kathmandu, Nepal (Fast Forward; EL- 7th place)
Leg 8: Kathmandu, Nepal to Manila, Philippines (NEL- 6th place)
Leg 9: Manila, Philippines to Melbourne, Australia (EL- 6th place)
Leg 10: Melbourne, Australia to Cuzco, Peru (Double U-turn; EL- 5th place)
Leg 11: Cuzco, Peru to Guayaquil, Ecuador (NEL- 4th place)
Leg 12: Guayaquil to Galapagos Islands, Ecuador (EL-4th place)
Leg 13: Ecuador to Belmopan, Belize to New Orleans, U.S.A. (Finale)
Key:
EL- Elimination Leg
NEL- Non Elimination Leg
KRL- Keep Racing Leg
6 continents, 13 countries, 2 new (Nepal and Belize)
I personally miss the final leg having a penultimate destination (Alaska, Hawaii, Puerto Rico, Canada, France) before heading to the Final City and would love to see them hit some of the countries that would otherwise get neglected because they're too close.