I have read some speculation this exhibit will house white-tailed deer, but I'm not sure if its future inhabitants have ever been officially confirmed.
@Anubite I agree that it seems a bit on the small side for large cervids, and certainly smaller than the space the wapitis occupied until recently. That said, they only have a small non-breeding herd of three female wapitis, so it also wouldn't be totally unacceptable.
Some have also speculated the moose might move to this exhibit, and the wapitis to the current moose exhibit. The relatively wet character of this exhibit would suit moose, but the area would be even more on the small side for them.
@Anubite I don't think they could really expand this exhibit much further, as there's keeper and visitor roads and exhibits all around it (You can see on the right side how close it is to the raptor aviaries and mews). All they could do to add a little bit of space is (re)move the nearby gift shop tent.
