I totally agree that Paradise Gardens is an absolutely perfect opportunity to give thematic richness to this somewhat generic food-centric location and give DCA its own New Orleans Square, so to speak, in terms of a culturally rich thematic land with great vibes.
I do think they need to think through the traffic implications (e.g., route to Simba) now and not kick the can and hope to solve it later. I posted a layout above that turns Paradise Gardens into the village of Santa Cecilia and uses a Pirates of the Caribbean-like marigold bridge and main-walkway-underpass to weave through-trafffic to Simba with queue traffic to the Coco dark ride.
Here's a second take below in which the highs/lows are flipped, so the queue traffic goes under the walkway to Simba. For example, enter a mausoleum in the cemetery and slope down and under. This allows the walkway-to-Simba path to elevate and clear the Coco queue traffic
and the perimeter service road.
But this layout also preserves the parade storage building and an unobstructed route to bring the floats out onto DCA's main walkway.
The point of all this is:
1. Paradise Gardens absolutely could be Santa Cecilia, and be connected to the dark ride behind Incredicoaster. Disney has used elevation changes for traffic-weaving before.
2. The parade functions can be retained.
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