I mean, he's beyond delusional. If he really thinks fighters are going to forgo the big 4 titles for a UFC style circuit, he's out of his mind. Not only that, but boxers today demand a certain degree of respect in how they are treated and represented. We've seen how Dana treats his fighters. He'll pay them bottom dollar, even when they're super stars, shit talk them to the media, then hang them out to dry once he's lost his interest in them. Add the fact that he has zero boxing connections and he's clearly not the guy for this business.
On a side note, here's a little fun fact about Dana: he originally wanted to sell the UFC for pennies and not do TUF (which basically saved the UFC) in the early-mid 2000s until the Fertitta's ignored him and went through with it anyhow.