I only follow Boxing when a fight interest me, so forgive my naivety regarding politics and money in the sport, but surely the WBC, IBF, WBO et al can see that the unification match has to happen?
Just from a promotion and money standpoint, they'd all make a fortune from the fight and the hype could help bring in lapsed/fairweather fans/new fans to the sport again. Create a dream card using the undercard and make the night a huge celebration of boxing and watch the cash fucking roll in.