First, I think you're right that only time will tell.
Second, you have to consider that the Bronx Zoo is part of a much larger empire that includes, among other facilities, the Coney Island Aquarium. Sandy did major damage out there, and there was already a major expansion planned there, as a result of which the aquarium has absorbed the larger share of the WCS's capital expenditures recently. (They got insurance money, but it's never enough, of course.) In the 2014 annual report, which you can access on line, for the FY ending June 30, 2014, they spent $13.6 million at the Bronx Zoo and $20.9 million at Coney Island. The new shark exhibit will be the star attraction, will cost $157 million, and should be spectacular:
http://www.nydailynews.com/new-york...ound-new-127m-shark-exhibit-article-1.1571425
Third, as you can see from the report, there has been considerable capital spending at the Bronx Zoo itself recently, although a lot of it has been behind the scenes or off exhibit, such as roof and boiler replacements, the new Quarantine Center and the new Animal Ambassador Center where they house all the animals used in the education programs. This sort of stuff isn't anything you can see but is somewhere between very important and essential. The recent stuff you can see includes the Children's Zoo, a multi-million dollar project, and the Komodo Dragon Exhibit. The newly refurbished second floor of the World of Birds is either already open or will open by the end of the summer, and that could not have been a small project given the size of the building.
Fourth, I suspect, but don't know, that there are other things brewing for the Bronx Zoo. It never stands still, and, as one possible example, the old Monkey House is ripe for re-imagining. It can't be torn down, since it's legally landmarked, and has such a prominent location in the zoo that I'm sure they're going to do something with it. Whenever they do something new, they do it right and state of the art, which takes considerable planning and design and some fund raising, all of which takes time. From what I've noticed over the years, they tend to be closed mouth about projects until they're pretty much completely designed and funded and they're ready to break ground. So we just wait to hear more.