Melbourne needs a two decade or longer plan to revamp the entire zoo. So much wasted space, i degress. I actually think it would be better to see Werribee take the baboons. While melbourne builds a tiger complex comparable to Taronga zoo's. Then they could hold a decent number and potentially have periodic breeding. The exhibits at taronga also allow for easy viewing and good enrichment for the cats themselves.
Keeping them seperate geographically to a degree would enable to Melbourne to focus on SEA and SA species. Which tend to be smaller and more suited to melbourne. With the exception of werribee obtaining greater one horned rhino. But then that fits the safari feel they are going for.
Melbourne’s Sumatran tiger set up is unusual in that they’re managed across two exhibits at opposite ends of the zoo. I understand the TOTE exhibit has extensive BOH facilities and breeding of two litters was undertaken within this facility, so I would assume the long term plan is for a new breeding pair to be brought in once Hutan passes, with the second exhibit acting in support.
The breeding pair in TOTE could produce a litter, which would move to the exhibit in carnivores at 12-18 months to continue their socialisation with their siblings until transferring out at 3-4 years. If Melbourne can import a genetically valuable pair, they could expect at least two breeding recommendations, with regional demand for any cubs produced. Compare this to other zoos, some of which have to accomodate their own surplus.