Animal Ambassadors will bring out different animals native to South America at different times throughout the day, similar to what was done previously in the area. The sloth was always a guest favorite and will be returning. Flamingoes and parrots will always be present in the area, just as they were previously.
So, as far as I know, nothing is changing about the animals in the area.
A new section with exhibits and hands on learning kiosks will be added though, to teach guests about conservation methods of fresh water ecosystems.