I honestly do not know. At one point there was a large poster outlining all of the plans for the outdoor pools but that has been taken down as I searched for it today without any luck. The aquarium's website used to have a detailed blueprint for the future use of the outdoor area and that seems to have disappeared as well. The model that is in this photo came with zero identification signs and so it is a bit of a guessing game at the moment.
I can tell you that the row of forest along the bottom (including a few short pathways) and the forest area along the right-hand side are all outside of the aquarium's footage. The large tank on the right seems as if it will be the new beluga whale tank but it doesn't quite line up with this image:
If we assume that the huge tank on the right is for beluga whales then the pools on the left could be for rescued dolphins (the big one), seals and sea lions. Just above that section are two smaller pools that seem likely to be for sea otters, while a covered area just to the right of those two small pools could well be a seabird aviary. All of these things have been mentioned by the aquarium in the past, as well as the possibility of a beaver exhibit.
The line-up of marine mammals as it stands right now is very impressive but I'm not sure if they will all be there in the future. It seems likely that the current penguin exhibit (which is very poor and was originally announced as temporary) will be gone.
Marine Mammals as of March 27th, 2016:
On further thought, the beluga whale exhibit could easily be the large pool area on the left (where they are now) and the right-hand side could be used for dolphins. The habitat on the left-hand side seems to visually line up with this image although nothing is exact:
Anyway, until the aquarium releases some information in regards to specific future plans then we will all be in the dark.
The link that I provided above matches the model of the beluga whale exhibit and so at least that section of the outdoor zone has been designed. Model image:
I may be able to help shed some light on the situation as well. The entire complex on the right will indeed be devoted entirely to belugas, and more than likely the harbour porpoises as well. One of the main issues is that the current beluga exhibit does not allow for long term holding of two separate groups of animals, so when any of the females have calves, it necessitates moving any mature males into their off display research pool. With the new, larger exhibit, there are two large, on display pools, which will enable females with calves and mature males to remain on display together, as well as keep the entire group in visual and vocal contact with each other, which is excellent for maintaining social bonds in the group. Single females and juvenile males will also be able to switch between nursery groups and adult animals with this system as well, which is a plus. Considering Vancouver owns some 5-6 belugas on loan to various institutions in the states, plus their two breeding females currently on site, I would not be surprised to see their beluga population rise quickly once the new pool is completed.
The old Beluga pool, which is quite impressive in its own right, will become home to the False Killer Whale and Pacific White Sided Dolphin(of which I would not be surprised to see the aquarium bring in more of, either from Japan or the states), and the remaining two central pools will be primarily for assorted pinniped species, but also also serve as holding pools for cetaceans as well. Original plans pre 2014 called for the dolphins and porpoises to be housed together, however as False Killer Whales are known to eat smaller cetaceans in the wild, I doubt that plan will come to fruition now.
I believe the aim of the entire new complex is to have all the pools connected via underwater gates, which will facilitated moving of the animals throughout the entire complex with relative ease.
