Given the deference the courts generally give the legislatures, and their typical avoidance of delving into legislative intent, it is most likely if this gets blocked legally it will be because of contract issues relating to the bonds. For a lot of good reasons there’s precedent and legal prohibitions against a State just “legislating away” its contract obligations, as otherwise the various individual States could sign contracts that seem really beneficial to the vendor, then pass legislation nullifying them. This would obviously cause a lot of commerce issues for the country as a whole, so unsurprisingly States cannot do this.
The best path to closing it out and avoiding the issues would be finding an eminent domain argument to seizing the bonds, meaning the State would then be allowed to take ownership of them from all of the bondholders, at current market value + possibly the future value of money value as well. That could pre-empt a contractual prohibition on early redemption.
The specifics of that would be complicated to say the least. While I had earlier speculated that it isn’t even certain Disney will care to contest this legally, I was not at the time thinking about the bondholders–it is highly likely some of the bondholders will challenge this in Federal court and that process will have to play out before the District’s legal status is finalized.