Bobby Lashley Versus Brock Lesnar?

On an appearance on ESPN Radio, Bobby Lashley said that he wanted to fight current UFC Heavyweight Champion Brock Lesnar.
Of course we all know that Brock and Bobby both worked for WWE.
But how cool would it be (and how many tickets would they sell) if Vince could somehow wrangle the UFC into working with the WWE to do this match up at a WWE PPV?

Of course it won't happen.
Brock has distanced himself from the WWE, although even in the cage he still acts like a good old fashioned pro wrestling heel.
Just look at his last fight. His antics after the match would make Stone Cold Steve Austin proud.
And Bobby is signed with TNA, WWE's main rival.
Yes he said in that same ESPN interview that he has signed a TNA contract and will be appearing at the TNA Victory Road pay-per-view on Sunday.

But Vince is always looking for something fresh and exciting, this would be a world class event, combining pro wrestling and MMA.
Of course the match would have to be straight up MMA rules.
No run-ins by Kane or John Cena or Batista.
No sudden appearance by the Undertaker.
(Though in the middle of the bout, how cool would it be to have the lights go out and hear "Bonnng!"?)