I always thought that the Night Hunters building might make a decent reptile house with some modifications. Cincinnati's Reptile House is fairly tiny and sad. It's only worth keeping around for it's architectural significance. In a world where the zoo had the space and funding, it would have ceased to hold animals decades ago.
At the end of the day, it's the same old story in Cincinnati, and it's tough to digest for someone who grew up seeing it as one of the premier holders of rare species in the US. The space is limited, the buildings are really neat, but older than dirt and limited in their capacity of keeping animals, and the current zoo climate in general doesn't lend itself to individuality among institutions or acquisitions of new species.
It's a nationwide trend, but I can't think of a zoo that's suffered more from the homogenization of zoo "kept species" list than Cincy. The place has made huge steps forward in updating it's physical plant and actual footprint in terms of area and usable space. Unfortunately, the collection hasn't kept pace with these improvements.
The zoo makes more headlines for deaths in their increasingly elderly collection than it does for species acquisition. I know that's an oversimplification, but it's absolutely boring and bleak. I guess I'll just wait for the inevitable breeding of the hippos and the ill-advised cramming of 4 individuals into that tiny exhibit while the zoo runs a publicity campaign rivaling the Super Bowl to paint it as a Christmas miracle. Barf. At least the gardens are still pretty to look at.