This is true I think we can expect a lot of new exhibits in the space of the current elephant complex. Considering the current complex (especially the BOH area) is beginning to age a renovation at least would be welcomed.I believe they are most likely redeveloping a lot of the elephants area anyway from the sounds of it, so probably not so cost prohibitive compared to current plans anyway. New fencing, planting and an aerial path.
Again - I don't think it is the best move anyway. With Melbourne's lack of space overall, any planned expansion of Gorillas at Zoos Vic would be better off at Werribee. I'd love to see Baboons moved to current Gorilla enclosure (edit: at WORZ), and Gorillas moved to a new enclosure down in the wooded area beside the river (I doubt this will happen as I am sure Zoos Vic want this to remain a native nature walk). But I would love to see the Gorillas in a forest, potentially with an aerial path for the public to view them in the space.
There's a lot of space at Werribee to work with; I've always thought a large baboon colony numbering in the 30's or 40's would look amazing on the gorilla island.