Ok. Based on our spoilers, only 7 teams remain during the New Zealand Leg, which means:
Leg 1 - Malaysia: NEL
Leg 2 - Malaysia: EL
Leg 3 - Sri Lanka: EL
Leg 4 - Philippines: EL
Leg 5 - New Zealand: ?
Leg 6 - Australia: ?
Three teams are eliminated before the New Zealand Leg.
Seven teams remain racing for the NZ Leg.
These six teams are
SURE to be racing in Leg 5:
Richard and Richard - seen at the Philippine airport
Ethan and Khairie - seen at the Philippine airport, and in Australia
Ivan and Hilda - seen at the Philippine airport
Jess and Lani - seen at the Philippine airport, and at the NZ news articles
Hussein and Natasha - seen at the Philippine airport
Dimple and Sunaina - seen at the Philippine airport
If Claire and Michelle are the girls in the Australian picture with Ethan and Khairie, then Alan and Wendy might be eliminated on Leg 2, 3, or 4.
Furthermore, the airport counter lady (franz_manu)
did not see Claire and Michelle there at the counter, but she knows they are still in the race (and she feels they even lasted long). This means our first three teams to be eliminated are:
Yani and Nadine
Sahil and Manas
Alan and Wendy
DISCLAIMER: This list is prone to errors, though.