I also wouldnt coin it amazonas lolHalf the time an Amazon pack is brought up, the monkeys people want aren't even from the Amazon. The black howler, golden lion tamarin, Geoffroy's spider monkey... Literally none of these are Amazonian lol.
Id go for central america scenery, geoffreys, spoon bill, ocelot and coati, best case macaws worst case normal exhibit.
If we follow that up with summer island animal pack, shetland pony, kunekune pig, nene goose, victoria crowned pidgeon, celebes crested macaque, lowland anoa, rhinoceros iguana, masagascar exhibit like a chameleon and then a treetops scenery with the second spider monkey, treekangaroo, yellow throated marten, preferably another bird and the correct sloth we just conveniently coverd south america, domestics, new guinea and back filled some usefull animals to SEA.
Mountain animal pack in winter with barbary sheep, geladas, golden pheasent, spectacle bear, alpine marmot, olm, yellow footed rock wallaby and the conveniently endemic to mountain rain forest cotton top tamarin and we got a banger last pack that fills up every neglected region besides NA.
Sounds like a damn good year to me and i just scrambled those together without much thought