re: Brock Lesnar to fight at UFC 200
Brock goes there and wins thus boosting his stock even more
For Vince the trade off may actually be promoting McGreggor/Mayweather since Flod isn't inked to anyone and he won't work with UFC. IT could also be Charlotte/Rousey since Charlotte has challenged her before on twitter.
Vince is going to get something from it. Even if that something is nothing more than seeing Brock whoop Punk's ass for laughs as he stalls constantly putting off his fight