There's been very little from North America I've wanted since the NA pack released, but one animal I still think would be cool to see is the Virginia opossum. Opossums are the most unique mammals from the Americas still missing from the game (quite literally from a phylogenetic standpoint), and the Virginia opossum is the species with the largest captive presence thanks to being kept in a substantial number of US facilities. If we get them, then we just need a peramelemorph (ideally the bilby) to have every order of marsupials kept in zoos represented in PZ.