There is no way Kennedy will be in the main event of Mania 24. Not with a main event picture that already features Cena, Orton, HHH, HBK, Edge, Khali, Taker, Rey, possibly Jericho, and Batista. Every single one of those guys is a bigger draw and more over.
That being said, we all expect Orton to take the belt off Cena at Summerslam. This is what I would like to happen. I think Orton and Cena should continue a program all the way through Survivor Series. Orton should win the belt clean at Summer Slam and cheat to win or get himself DQ'ed at the PPV's up to and including Survivor Series. You can keep Cena looking strong by having him pin Orton in several non title matches.
Now at Survivor Series, Orton hits Cena with an RKO on a Chair, Just as he is about to give Cena the Boot of Doom, HBK runs in and makes the save. HBK and Orton can Feud through the Royal Rumble, with Orton squeeking out victory after victory. At this point, HHH can come out and officially challenge Orton for the title. Orton, with the help of Coachman, can do his best to duck HHH and say that HHH will never have a shot at Orton's title, however, just when everyone least expects it, Stephanie comes out and announces that she has taken control of the WWE and her first act as the new owner is to fire Coachman and make HHH the number one contender. Then at Wrestlemania, the King of Kings goes back on his throne to capture his 11th championship as a face.
Now, as far as the other players in the main event scene (it all depends on when Taker and Edge come back), I would have Taker come back and take the title off Khali. I would have Edge come back and win the Rumble. This would set up Edge vs Taker for the WHC at Mania.
Cena and Batista could spend a while out of title contention. The match would be pretty easy to set up. They both were highly decorated champs on seperate shows and they want to see who the man is, with Cena going over Batista of course.
I would have Kennedy be the first back to back money in the bank winner where they could continue with the storyline that was dropped this year. The guy is just not over enough to be anywhere near the main event right now. He is jobbing in the mid card now for christ sake.
If Jericho does come back, I would put him in a program with Rey for Mania. Possibly for a number one contender spot. This should at least please the smarky Mania crowd.
So in short;
WWE Title
Orton (c) vs HHH: Winner: HHH
WHC
Taker (c) vs Edge: Winner Edge
ECW title: Fatal 4 way
John Morrison vs CM Punk vs Cor Von vs Burke (c): Winner CM Punk
Interpromotional Match:
Cena vs Batista: Winner: Cena
Interpromotional Match:
Rey Mysterio Vs Jericho: Winner: Jericho
MITB 4:
Kennedy vs Hardy vs Hardy vs MVP vs Dreamer vs Carlito vs Shelton vs Kane: Winner: Kennedy or MVP
Flair's Retirement Match
Ric Flair vs HBK: Winner HBK
Womens Title
Jillian vs Mickie (c): Winner: Jillian
Mark Henry vs The Great Khali (yes as a face): winner: Khali