First time hearing about this. As everyone else has said, this is wild to see! I saw the thread title and had to click to see if it was a generic zone about killer squirrels or something haha. There's just no way they actually got Disney to play ball after all these years? And yet, here we are!
This is definitely the most involved Disney has been with a Universal Studios project afaik, maybe outside of the Hulk retrack or Spidey's refresh in Orlando? It feels like a test for the Simpsons IP. Simpsons seems to fit the tone and demographics of the UDX parks far more than it does within Disney's.
Maybe if this goes really well they expand to other HHN events? Maybe this points to extended contracts on both coasts? Or maybe Disney takes their ball and goes home right after this wraps. Very very curious to see what happens here going forward!