What do we have so far?
(1) ROADBLOCK seems to be the horsey-do which looks like it happens early in morning for some teams, therefore probably is in the Pampas area near Mendoza site of the Pit Stop. It looks like the rider has to race through a course around a series of barrels or a slalom race course, and at the end they must pass under a wire perhaps to grab something hanging. This may be a timed event and the rider has to complete the task in a predetermined time. From the looks of the previews some teams do this early in the morning and others much later almost to noon time.
(2) The question is do they go directly to the horse ranch or do they have to find a famous landmark such as a statue of General San Martin first.
(3) The next event we have a preview of is the race around the various waterways in the Delta del Tigre area north of Buenos aires.
(4) The question is how do the teams get from Mendoza to El Tigre? Train or Bus? The scenes 19, 20, 21, and 22 show teams riding in some kind of conveyance but certainly not an airplane (windows are too big and there are no pole to stand next to on an airplane. Perhaps they drive. Does anyone know how far it is from Mendoza to BA? If there is a flight, this would be another natural bunching point of which we always seem to have at least one in each ep.
(5) The DETOUR, or at least one part of the detour seems to be to find a ship wreck that matches the picture they have received. The boat is being driven by a boatman and I guess the teams tell him where to go which tributary or stream to head up. This is similar to previous tasks.
(6) The question is if this is one task of the Detour, what is the other task?
(7) I do not think that Romber take the FF since there is a shot of them in a rubber boat racing some other team. If it were the FF they would not be racing another team nor would they be doing the same task as the other teams.
Just some thoughts to ponder over the weekend.