Out of those, I highly doubt ending the streak was one of them. And Heyman came back because of Brock I'm pretty sure, it was just happened that Punk ended up with him while the re-negotiations were going on for Brock I'm pretty sure. Plus, Punk and Heyman have history going back to WWECW. I could see him requesting a Title reign, or even Vince/HHH saying, 'hey man, you sign and we'll toss in a lengthy Title reign for ya'. The rest was just icing I feel.