Time to speculate on the pre-determined EL's and NEL's + the boot order.
Leg 1: (Mexico City, Mexico) Possibly NEL because I'm pretty sure TAR would want new viewers to stick around for an extra leg.
Leg 2: (Cartagena, Colombia) Most likely Marty & Hagan booted out.
Leg 3: (Cartagena, Colombia) Most likely Darius & Cameron booted out.
Leg 4: (Geneva, Switzerland + Chamomix, France) Most likely Jessica & Brittany, Erin & Joslyn, or nobody booted out.
Leg 5: (France) Ditto Leg 4.
Leg 6: (Yerevan, Armenia) Ditto Leg 4.
Leg 7: (Tbilisi, Georgia) Most likely Scott & Blair booted out.
Leg 8: (Dubai, UAE) Sheri & Cole NEL'd.
Leg 9: (Bali, Indonesia) 6 teams remaining. Spedbump present this leg. Most likely an EL.
Leg 10: (
) Hasn't happened yet, but most likely an EL.
Leg 11: (
) Hasn't happened as well, but it can be an EL or a NEL depending if it will be an F3 or F4 finale.
Leg 12: (USA) Hasn't happened; number of teams starting the leg will depend on the previous leg's situation.
Mostly speculation; only locations and Leg 8 confirmed.