The UFC already shapes events around marketability over merit as much as they can get away with. Look how long it took for Charles and Islam to get their title shots. The difficulty Islam had getting fights with people ranked above him on the way. Beneil and Belal still aren't getting title shots. Meanwhile, Colby gets away with just sitting out a year between title shot losses with fights against washed opponents sandwiched in between.

I don't think WWE as a product stands to gain much from becoming real. The UFC has brand value around being real, but you can see that management wants to sell drama, not sports.