I understand what the contract purports to say (I haven't read that section personally, but I believe the second-hand reports of its contents), but if it's true, how did this rumor for WDW ever develop any legs? Multiple people have claimed they've heard Disney was considering it, but how would such a thing ever get by the legal department if that section of the contract means what it appears to mean?
There are only two conclusions I can draw (again, assuming the contract is what it is):
1. The rumor was flat-out untrue (read: made up) in the case of WDW.
2. Somebody within Disney thinks there's an "out" or a loophole, at least as it pertains to Guardians characters.