Still some pampas stuff that could work well (rhea and mara off the top of my head). I'd really love a tamandua as well, or the two toed sloth (specially if sloths could work like butterflies and share a walkthrough).
And plenty of monkeys, poor capuchin is lonely. At least we are getting our 4th cercopithecid now, but no tropical macaques was an odd choice; more diversity in both cercopithecids and ceboids would be neat, as hominoids are pretty much fully represented (unless somebody thinks the 2 remaining gibbon genera, or additional gorilla and orangutan species should be implemented).
And, sifaka nonwithstanding, more strepsirhinians would rule. Aye-aye my beloved.
