I get that you love orca or whatever and you want to see them in the game, that's fine, I'm not going to bother trying to make you understand the other side of the argument. In the same way that you ask us not to get upset if Frontier does include them, however, it's equally fair of us to ask you not to get upset if they don't.
I was bummed out that we didn't get the Arctic fox in the Arctic Pack, and instead got the Arctic wolf, but at least I can recognise that they probably had this in the works before the game even launched and it was too late to change anything. I was a little bummed out that we got the llama in the South America Pack instead of a capybara, or maned wolf, or even another monkey (there's no such thing as too many monkeys in a zoo), but I could at least understand their reasoning for including it, and again, no doubt they were already working on it before they had a clearer idea of what people wanted included. So in the same way, if, and it's a very big 'if', they ever include a Marine DLC, and there are no dolphins or orca or gigantic sharks, and instead we get sea lions, penguins, and aquarium fish, do you think you'll be able to shrug your shoulders and at least understand why they didn't include what you wanted? Will you be able to just move on from that, in the same way that most of us moved on from the Arctic fox and capybara?
I guess reagrding real life we are probaly pretty much agreeing, however for the game I am sure we never will, so its good you wont try it again
Oh, I would have liked the fox, capybara, maned wolf etc. aswell, just saying^^ Though I also really like the animals they offered instead.
Well, in my opinion getting "upset" and "moving on" are not exactly the same thing. Meaning if they would add such a pack without orcas, I would be a little sad, yes. However, even though its probaly crazy, I would still hope that maybe they have the same idea of a special Cetacean pack (like I already mentioned before) until the end of support, even if it was in vain. Sure, if they did add any kind of dolphin in such a Marine pack, but no orca or if it was the last DLC ever, then of course I would lose hope. But before that happens I will hope for them forever. And honestly, I would then shift my hopes probaly rather towrads "the future" instead of really losing hope

(By the way, I dont want/need sharks in the game at all. Neither gigantic, big, medium or small. Not that I would mind if they got added, just that they are not in my preference.)
However, that does not mean I would get upset or shame/hate on Frontier for it. I really love Planet Zoo and yes, its almost perfect for me (there are a few small things that bother me, but I can live with them, though I would have preferd it done differntly). Right now I have well over 1000 hours, placed in the top rank for every community challenge, played everyday since release (except for maybe 4 days I wasnt at home and simply couldnt play), however also lots of bugs hit me, some rather funny others however pretty much game breaking, which I know some others who experienced those gave up on the game, at least took a longer break. Of course those bugs usually hit my favourite zoos at those times and made them unplayable for weeks/months.... Also I had a pretty much unique bug that no one really understood and it took months to fix it (and honestly, I think it was just fixed by chance

) which was also the reason I came to this forum in the first place^^
And yet I always kept playing, though I cant say it didnt bother me at all, but I never got upset at Frontier for it and never said a bad word about them.
So no, should Frontier never add orcas to PZ I would not shame/hate/get upset at them. Understand the reasons? As I am sure they would never tell the exact reasons anyway, its kind of a guessing game anyways, could be technical reasons, never planned in, dont want them in etc. So yeah, I will have to accept that, at least when the game ends. But before it ends I can still hope, if you know what I mean.
So the conclusion is I wont get upset if they dont add them,(I will just be a little sad, this wont bother anyone, though

) however, just as you have a right to show your disappointment should they add them, I can still continue to hope for them should they not. Which may be in vain, but could also be successful, at least in a possible future game.
Though I guess one will only understand this when you really, really desire an animal for the game.
Also I am pretty fine with every animal they could add. There sure are some animals I would rather love to see then others, however I am still fine with any, its just only the orca I really want to see.
And now you, in a scenario were they did add them in...
Could you understand why they did it?
Would you "move on" in a way that you could accept it or would it totally move you away from Planet Zoo?
Honestly, I am on the side that I dont want a statement beforehand from them at all. And even for both reasons. Even if they say "Yes, we are going to add in orcas/cetaceans" it would be awesome for me, but it would get me soo excited if they are not adding them in within a few months from then, I dont know how I could survive another year or two, knowing they will come

Half a year I could maybe do, but longer would be awful for me.
And the "no" option would be worse for me of course, pretty crushing. I rather have my hopes until the "end" (=end of support for PZ) Also it would be so final, like I dont know how the devs stand on this topic is currently, maybe they are split about it aswell, who knows? If they already say "no" now, that would mean a forver no.
So I would rather like they keep their options open (like they currently do, hardly confirm or de-confirm anything regarding future plans)
Also for me personally it would be easier to move on from it when the game is over. Right now I am still pretty addicted to the game (which is years ago that a game captivated me so much, I think the last time was like The Sims 3), but I kind of hope it grows more boring to me in the next months, so that maybe I even "forget" about it for some time, which would make things even easier
About the polar bear, I dont know why everyone has such problems with them in franchise - I have them in very huge habitats and everything is just fine^^