If you check out the UFC 122 Q & A you can hear Dana explain that Brock never asked to fight Roy Nelson (wich makes it even more probable that it was Nelson himself spreading the rumour). Dana also says that last he heard from Brock was that he wants to fight Mir again.
Dana then confesses that he wants Overeem to the UFC. He also predicts the end of Bellator in the near future and says he would love to sign Eddie Alvarez...
Check it out!
http://mma-torrents.com/torrents-details.php?id=10203