I’d love all these - but imo the only major zoo antelope/antelope group missing now (considering we’ve gotten the Dik-dik, Blackbuck and Nilgai recently) is the common eland - a common representative of the largest antelope group on the planet (get out of here with your non-existent in captivity Lord Derby’s eland people).
and if we get a safari pack imo the common eland should be the obligatory antelope that we get.