That's also why I doubted the 'Black Box' rumors when those started popping up.
Yeah, if it was rumored for DLR, I'd buy it because Disney gets more crazy with overlays there, but in WDW? No way. Disney would never green light an attraction where the main appeal was 'we can swap it out for different things' for Florida.
I expect: something regarding Simpsons will pop up in DHS in the decade following Simpsons leaving USF, I don't expect a full land at this rate (Disney doesn't give that much attention to TV Shows EVER), but I can fully expect a Krusty Burger, meet and greet and gift shop apart of something greater.