Yes, I just doubt Zoos Vic would install a path straight past their BTS big cat facilities that are designed for off display breeding and the like.There is a standard path that runs directly from the end of the Treetop Monkey trail through to the TOTE, which skirts between the tiger enclosure and back-of-house native bird breeding facility.
I could see the Tiger enclosure being reconfigured for gorilla, and tiger moved around near the barn potentially - probably wouldn't be the solution but I could see the path potentially being used, or the Treetop Money trail being extended above it.
Treetop Monkey trail is probably my favourite part of the whole zoo, and I for many years have liked to imagine it being extended further, even if it were to be a continuation that included more aviaries, and other non-primate species. Sloth maybe, or smaller rainforest cats...
In fact if this treetop trail did continue along that trajectory, it could then swing left towards th first paddock, giving a higher view of a potential orangutan/gibbon into an expanded lake with two islands, with more treetop exhibits continuing towards a descent at the exit of the Butterfly House. and a second Gorilla bachelor enclosure based in Man Jai's paddock, or the matriachal paddock.
the matriarchal paddock could be then made for Spirit or Kermode bears, as they are also found in rainforests
The trail at the other end once it loops to the current Orangutan enclosure, could cut back across past the island exhibit, and tap back in finishing with the tiger and otters.
Since the current Tiger enclosure is directly behind the current gorilla exhibit, that would make sense; especially if they're no longer going to use that path that goes in between to exit, that would allow both exhibits to be back to back with the current dens just needing to be extended a little bit (which could allow for an indoor enclosure too that could potentially be viewed from the main path).
If that was the case, I think they'd then likely use the first elephant enclosure for a fourth orangutan exhibit (assuming they'd use the adjacent island too) and would leave the other two elephant exhibits for Tigers if they want a decent breeding complex. The enclosure in the Carnivores trail could then be vacated for Sun Bears *hopefully*