That is what will be interesting, once we get some facts and actual experts to weigh in on the matter (not fourm hounds).
For example, there is a member of the governors office on record this morning (or last night? I can't find the link right now, it was a cable news interview) saying that they has been looking into this since 2019 when he was elected to office. That should be pretty easy to prove in a court of law, should it be true, as there would be some paper trail regarding his staff working on researching the topic.
Desantis is a lot of things - just not an idiot. I'm rather certain he didn't just invent this last week, as scores and scores of people are assuming to be gospel truth. What he did is find a time to whip it out, when he knew he had political support to do so, and Disney gave him the perfect opportunity to bring it up.