We had too much water/island this season, so I think there will be no exotic islands in S23.
I think we will see the race return to either China or Latin America in the first leg, but both will probably be visited at one point.
I also speculate there will be an obvious (to the audience) memory challenge in the finale.
My gut feeling tells me there will only be one or two M/M teams, in case Bates & Anthony win this season, and the majority of the cast will be M/F.