I looked briefly but didn't see this discussed, though the article is from August so I may have completely missed the discussion...
http://www.wwe.com/shows/raw/2012-08-20/five-things-brock-has-yet-to-accomplish-26047440
Basically it says that Lesnar could still:
Become GM
Beat John Cena
Challenge The Rock in a rematch
Challenge The Streak
Become WHC
I know we are meant to believe that WWE.com doesn't have anything to do with WWE itself, but could this be a sight of things to come in Lesnar's future?