According to BBFC.co.uk the following is the additional material to be included on The John Cena Experience Blu-ray.
Note the headings are vague in some cases, so we will update you on more specific info as soon as we can.
Wrestlemania – March 28 [23:47] (presumably John Cena vs Batista, full match)
Flip like a Champion [1:23]
Wrestlemania Entrance Rehearsal – March 27 [2:22]
Flux Capacitor [6:11]
Q & A [1:49]
John Cena [4:52] (no idea on this)
Wrestlemania Axxess – March 25 [4:00]
There is also one listed simply as Additional Material which has a runtime of nearly 7 minutes. We’ll update you on the fully confirmed list shortly. Thanks to Josh for passing along this info.