WWE posted some videos of CM Punk & John Cena leading up to their match at Summerslam:

WWE.com Exclusive: John Cena and CM Punk discuss their rivalry as SummerSlam approaches

http://www.youtube.com/watch?v=RDzb3PFmRcA

WWE.com Exclusive: John Cena and CM Punk comment on their Undisputed WWE Championship Match at SummerSlam

http://www.youtube.com/watch?v=yN9cd7zSDTc

WWE.com Exclusive: John Cena and CM Punk give their thoughts on Triple Hs new role as WWE COO

http://www.youtube.com/watch?v=aoMKyqbCnMY