I don’t think that it was much discussed but ARBOREAL animal pack could be really interesting and benefit from brachiation with:
Sloths
Monkeys
New world porcupines
Kinkajous
Coatis
Fossas
Gibbons
Tree kangaroos
Small Cats
Birds
An arboreal pack could be really good, especially if they covered animals from as many continents and forest types as possible. Some of my favoured potential options include:
Animals that would probably/definitely need a new movement rig (choose four of each):
North American tree porcupine
Colombian red howler monkey - Would come with new chorus behaviour
Red-faced black spider monkey - Would come with brachiation
Linnaeus' two-toed sloth
Goodfellow's tree kangaroo
Eastern black-and-white colobus - Could also come with new chorus behaviour *
Any species of
African rainforest guenon
Yellow-throated marten
Eurasian red squirrel
Coquerel's sifaka - May be quite difficult to make, as they move by leaping between vertical trunks more than they do by climbing
A turaco (my preference is the white-cheeked) - They are very weak flyers that are more at home running along tree branches and hopping through vegetation; the leaping between climbing features would probably suit these birds better than actual climbing would
Parson's chameleon - They are the biggest chameleons (as big as cats), have a lot of features I fear would be missed if they were exhibit animals (feeding animations, the simple grace of their movement) and perhaps surprisingly this species is not only tolerant but possibly reliant on lower temperatures - the private keepers who have real success with these animals often allow them regular outdoor access, even in areas as temperate as Germany and Minnesota
* The males make this territorial noise that can carry for up to a mile, but I'm not certain if it would constitute chorus behaviour because it may be that only the dominant male actually calls:
https://sounds.bl.uk/Environment/Listen-to-Nature/022M-LISTNAT00088-0001V0
Animals that could probably use an existing rig:
Common brushtail possum - Actually shares a lot of behaviours with the red panda, and could probably be made using it
Another gibbon - Not sure if I really have a preference, but would use the siamang rig and has a combination of brachiation and chorus behaviour
A
small cat - The margay is the most arboreal and could probably use the clouded leopard rig (although slow-motion jumping would need to be fixed)
Spectacled bear - Could be repurposed from another bear species
Kinkajou - Would probably use similar animations to the binturong, including the tail hanging
Siberian musk deer - As this photo shows, musk deer are actually capable of climbing trees and do so to feed on lichen when snow covers the ground vegetation; could probably be repurposed from another ungulate
Markhor - Can also climb trees and would use the same rig as the Dall sheep and ibex
Crocodile monitor - Could use the existing monitor rig, but it would need climbing animations added (perhaps using this opportunity to add climbing to the Nile monitor and young Komodo dragons)
Trying to choose just seven from that list is actually really tricky - for an exhibit I would probably choose some sort of gecko, although the golden-eyed stick insect is a species I would love to see as well; they are critically endangered, commonly kept and would be the first South American insect in the game that actually exists in captivity.