Even putting aside what we discussed above regarding thematic fit, I'm concerned that putting Zootopia in that area would feel incongruous with the rest of the park from a visual standpoint.
That's assuming they clone what they're building in Shanghai, of course, but I think we can basically all agree that's likely what they would do based on their recent track record. Considering they're just cloning FEA in other parks instead of building something new and impressive for Frozen, I can't imagine they'd want to design something new for Zootopia instead of using what already exists.
That means there would essentially be a modern city in that location, which would be a drastic departure from everything else at Animal Kingdom.