#1 To attack Triple H...and side with Vince McMahon
Triple H has been front and centre in leading NXT's charge in the lead up to Survivor Series in an angle not totally dissimilar to the infamous WCW invasion angle headed up by Shane and Stephanie McMahon back in 2001.
Back then, it was a returning Rock who ended up choosing the 'devil he knew as compared to the devils he didn't' and siding with Vince McMahon and WWE over the pretenders to the throne.
Having CM Punk feature in a similar role, coming to RAW and SmackDown's aid when Triple H and NXT deign to run roughshod over them, would be a classic, tried-and-tested babyface return angle.
It would also make sense for Punk to be pitted against Triple H because The Game was heavily involved in the machinations that saw Summer of Punk end in ignominy.
A spot of payback never hurt anyone. Especially in a platform like Survivor Series that promises to deliver an intriguing clash between the established RAW and SmackDown brands and the rebel upstart that is NXT.
It almost smacks of a change in culture.