The WWE writing team knew about Paul Heyman’s return this past Monday but he was flown to Greensboro, North Carolina and hid in a trailer all day to keep it a surprise from everyone else. Vince McMahon let CM Punk know about it with the idea that Punk could tease a surprise on Twitter and help boost viewership.
Heyman has been involved with Lesnar’s character for at least a few weeks, if not from the start, just not working through WWE. WWE reportedly didn’t want Heyman involved to the point that last year when the WWE ’12 deal with Lesnar was going on, at first it was going to be Lesnar managed by Heyman in the game and WWE wanted Heyman out.
(Source: Wrestling Observer Newsletter)