http://insidefights.com/2012/05/27/brock-lesnar-back-to-the-ufc-having-meeting-with-dana-white-after-ufc-146-was-in-crowd/
I think his appearance on the show last night was just a WWE publicity thing so that the next time they bring him out he can be all "Oh, I'm an OUTSIDER and I want to go back to UFC and not wrestle in your wrestling show" and HHH can be all "Grrrr, you signed this exclusive contract to wrestle in our wrestling show and I'm the COO and wrestled Undertaker two years in a row, and I'm very angry because now I'm corporate and can't wear a leather vest over a jean jacket in public anymore, grrrr." And then they'll fight at Summerslam or something. I will say that Brock would be, what's the word I'm looking for here, oh yeah, fucking retarded to even think of getting back into this heavyweight division, because Junior would knock him out even faster than Overeem did. However, if they did Brock v. Fedor or some other tomato can opponent and put it on PPV or even on FOX to draw a monster rating, it might be an interesting experiment.