How will The Rock electrify at WrestleMania 29?

As we all know that The Rock has gone on record saying that he will be present in Wrestlemania 29. But we do not know how will he participate. WWE.com has taken 5 presentations how The Rock will electrify at Wrestlemania XXIX

1. Challenge for (or defend) the WWE Championship

2. Challenge The Streak

3. Challenge for the Tag Team Championships

4. Rematch against John Cena

5. Rock Concert with Bruce Springsteen