From reading the first link and the version of the story, I truly wonder what kind of case he has.
1. someone more familiar with the ADA can probably correct me if I'm wrong, but my understanding is that the ADA has provisions to allow structures and attractions predating the ADA some leeway when it comes to it's adherence to the ADA guideline. Small world at
Disneyland dates to the '64 World's Fair.... LONG before the ADA. While some modifications have been made to accommodate those with disabilities.... such as the addition of wheelchair boats over the years, the area inside the attraction hasn't gone thru any MAJOR changes that would require conforming to current laws/guideline. I don't think Painting and adding a couple figures (and repairing others) counts as major work.
2. There is a very big difference between an emergency evacuation, and a courtesy evacuation. The article did not mention what kind of evac it was. Disney would have procedures in place to ensure ALL GUESTS were evacuated in the case of an emergency evac. If however this was a case of a courtesy evac.... meaning a technical difficulty preventing smooth running of the ride that may have guests waiting for a prolonged period of time... Those procedures would likely be very different. ESPECIALLY if the guest has a spinal injury, I do not doubt that CM's would determine that the risk of aggravating the guest's injury would outweigh the apparent danger he was in if he waited.