Yeah looking in the past, it seems that anybody not named Taylor/Courtney are in danger (Even if Dylan/Kwame won the last leg, they have not been performing that well...) But that's the beauty of the race: You never know what's going to happen. Look at season 1, Jet/Dave won 3 legs and were favorite, but lost the penultimate leg.
From the preview, it seems we have in the following order:
- Guard Task
- Detour at CFB Gagetown
- Face-off at Lady Beaverbrook Gymnasium
- Roadblock (It looked based on the preview at an art gallery, maybe the Beaverbrook Art Gallery)
- Pitstop at Governor House
Maybe there is one more cluebox or route info somewhere else also..