I initially thought this myself, but there's really nothing to stop them spreading the same IP out over multiple parks. As someone reminded me, Beauty and the Beast has a show in three out of the four theme parks. Little Mermaid will have a ride at MK and the return of the stage show at DHS. Nemo has an Epcot ride and an AK stage show. Frozen has the Epcot ride and a DHS sing along.
I have no clue what the IP they're going with for this alleged DHS attraction. But of all the parks Zootopia could be placed, DHS would probably make the most thematic sense. Plus it's still a current and actively used IP with a sequel coming next year, and there's the Shanghai ride they can clone. Probably pushes a lot of merch too. Again pure speculation on my part, but it makes a lot of sense. Not that Disney makes much sense anymore with their decisions...