In reality, it really shouldn’t be happening. At all. Ever.
Combat sports needs a boost. Boxing ratings aren’t what they once were when boxing was a cultural sport that garnered respect across multiple generations. In the past decade or so, there were only one or two fighters drawing million-dollar buys for pay-per-view. Mixed Martial Arts has been around for some time but the UFC, in particular, is still somewhat in its infancy. Stars shine and then fizzle out due to poor promotion and a crop of hungry new talent rising to replace them in the UFC.
The solution; take the biggest star in boxings recent history and pit him against the UFC’s current top star and have a mega-fight.