I'm not sure how a new district that's exactly like the old one makes any sense as an outcome. There's a huge cost to do that, it's not clear that it's any better for the bonds than dissolution (since it is dissolution and then new creation on top of that), and it's not clear why Disney would be incentivized to work on that. Keeping the current district and modifying it in some way seems more likely, but even then it'll be questionable what the modification is, unless it's something totally benign.
We keep pretending that RCID is the same as Disney too. But, it's not really. It is it's own government entity, not so different from other government entities. Managed by the people voted on to control the district by those that live within the districts boundaries. They just happen to all be Disney people through the very careful residential planning that's been occurring for 50 years.
I think this still comes down to how much Disney management values that influence into RCID they have because of that resident control vs all the public roads (and other public services) within the WDW boundaries being managed. After all, those are still public services managed by a public governmental entity. While we may say Disney maintains the roads, that's not really true. RCID maintains the public roads. Disney maintains the private roads. I'm still guessing there's someone in Disney comparing the direct cost advantages of dissolving the district to the long term strategic cost implications of all that public infrastructure being part of a larger entity. The huge negative local PR of just walking away and leaving the counties holding the bag is in there too.
One assumes the long term benefits are more important here. But, how many times have we seen quarterly impacts cause companies to make bad long term decisions. Not having to pay extra RCID taxes could be a big short term balance sheet boost without the impact seen for years and until the next management team. We all know how this board feels about the current management team.