The entire “void the entire contract because RCID failed to notify all landowners 60 days in advance by mail” seems highly dubious.
For the sake of discussion, let’s assume the former RCID board did fail to notify all of the district’s landowners.
The typical judge is going to hold up the contract, make sure all landowners are notified and, if none object within the 60 days required by statute, allow the contract to take effect.
What district landowner is going to object? They all have close business relationships with Disney. Are any of them going to want the new crazy board deciding what Disney can do instead of Disney?
Any judge worth their salt seeks the least invasive remedy.