But how would the WWE thing matter really? If they have in his contract they have to sign off on him doing something like this, then they either will or they won't. I'd imagine there's language in there that says the WWE has to okay it but who knows? Brock may have had it written in that they have no say as part of his agreement to come back. The UFC isn't gonna let the WWE have a say in his opponent.
So basically the WWE has no say at all, or they simply have the right to say yay or nay. There's no way they can come in and say "Okay, we'll let him fight, but not against THAT guy. We've seen him, he's a killer!" And the UFC simply wants to squeeze as much attention and ppv buys as they can out of Brock short term. At his age, he's not a long term project for them.
Regardless - if/when Brock fights I'll be genuinely surprised if he gets JDS, Hunt etc. it'll be a somewhat easy fight (on paper) - happy to be wrong; I'd like to see him v Hunt but I'm very skeptical. predicting Gonzaga/Struve