@Kaan We can at least hope and dream
Just a small thing I wanted to add - next to Loro Parque, there have been at least 4 zoos I know of that kept orcas for some time in the past. Yup, real zoos, if one might not accept Loro Parque as one. (I think there have been Safari Parks aswell, but I dont know them)
Tierpark Hagenbeck in Hamburg, Germany, one orca named "Orca" from 1981 - 1985 (I couldnt find much info about him or her, only that this orca was there on loan, but I dont know from whom and what happend to him/her? Did it die there? If not, where was it placed next? No idea... An orca named "Orca" is totally not easy to find
)
Cleethorpes in the UK (Calypso from 1969 - 1970, moved to Marineland Antibes/they also had at least one Beluga)
Dudley Zoo, also in the UK (Cuddles from 05/1971 - 02/1974, he died sadly)
Zoo Barcelona (Ulisses from 1983 -1994, moved to Sea World San Diego)
All of these places also kept (and maybe some of them still keep?) dolphins. And they stopped having orcas, because they either died or they just hadnt had enough space for them, let alone the money to maintain them. And dont get me wrong, its actually great those places dont keep them anymore!
Oh, and Zoo Duisburg also kept Belugas for many years and they still keep dolphins.
The reason I am saying this is simply to proof my point that just because this is Planet Zoo does not mean it could not have orcas, as there is no universal law that would forbid orcas and dolphins to be in anything but marine parks. For real life its of course great thats mostly a thing of the past, but for a game I see no problems, especailly not any ethical.
But in the end its up to the dev-team to decide.
Should PZ never add them I can only hope another devolper makes a zoo game that is at least as good as PZ and will add orcas aswell... or Frontier does a marine park game itself, but I doubt both
So my biggest hope is still they get added to PZ, this game is so awesome I just cant get back to play either of the Wildlife Park games or ZT

Just a small thing I wanted to add - next to Loro Parque, there have been at least 4 zoos I know of that kept orcas for some time in the past. Yup, real zoos, if one might not accept Loro Parque as one. (I think there have been Safari Parks aswell, but I dont know them)
Tierpark Hagenbeck in Hamburg, Germany, one orca named "Orca" from 1981 - 1985 (I couldnt find much info about him or her, only that this orca was there on loan, but I dont know from whom and what happend to him/her? Did it die there? If not, where was it placed next? No idea... An orca named "Orca" is totally not easy to find
Cleethorpes in the UK (Calypso from 1969 - 1970, moved to Marineland Antibes/they also had at least one Beluga)
Dudley Zoo, also in the UK (Cuddles from 05/1971 - 02/1974, he died sadly)
Zoo Barcelona (Ulisses from 1983 -1994, moved to Sea World San Diego)
All of these places also kept (and maybe some of them still keep?) dolphins. And they stopped having orcas, because they either died or they just hadnt had enough space for them, let alone the money to maintain them. And dont get me wrong, its actually great those places dont keep them anymore!
Oh, and Zoo Duisburg also kept Belugas for many years and they still keep dolphins.
The reason I am saying this is simply to proof my point that just because this is Planet Zoo does not mean it could not have orcas, as there is no universal law that would forbid orcas and dolphins to be in anything but marine parks. For real life its of course great thats mostly a thing of the past, but for a game I see no problems, especailly not any ethical.
But in the end its up to the dev-team to decide.
Should PZ never add them I can only hope another devolper makes a zoo game that is at least as good as PZ and will add orcas aswell... or Frontier does a marine park game itself, but I doubt both