HHH is going to win his title at the Royal Rumble. After that my guess is he turns heel. Cena comes back and competes for the title at Wrestlemania.
Edge will win the title this week by pinning Batista. Batista will get his rematch at Rumble and lose. Undertaker will win the Royal Rumble and challenge Edge for the title at Wrestlemania. Neither Edge or Undertaker have ever been defeated at Wrestlemania so it will be streak versus streak on top of title versus title.
When Cena and Lashley come back, Raw will have too many faces so it makes sense for HHH to become the top heel.
I don't think Cena will be back by Mania. From everything I have read, Summerslam is more likely.
I also don't see Edge winning over Batista that quickly. I could see Edge winning the Royal Rumble this year (being a snake of course) and then having another huge match with Taker who would beat Batista at the Rumble. In short, I agree with the Taker/Edge match, just don't think Edge will be the title holder. I really think Taker loses this year at Mania. We will know for sure who wins the night of Mania. If it is the Main event, the Face (Taker) will win. If not, Edge takes it.
My issue is also with the Raw roster. They really do have a shortage of Main Event Heels. Orton is the only possible headliner right now imo.
I really think the Main Event of Mania will be HHH going over Orton (the huge heel) for his first real Mania Moment. HHH has put over ALOT of talent at Wrestlemania in the past. I think Vince, Steph, and company will reward mr. Leveque handsomely.
So my thinking is this.
Edge over Taker for the Smackdown title. 3rd to last bout.
HHH over Orton in the Main Event. This closes the show.
Some other tidbits:
Ladder Match: Jeff Hardy, MVP, Hardcore Holly, Santino, Chuck Palumbo, & Rey Rey. - I predict Jeff Hardy to win it.
I could see Lashley & Batista having a one and done match at Mania as well.
Womens Title match: Beth Phoenix, Candice Michelle, & Mickie James in a Three Way Dance.
my bonus is... Kennedy and Jericho for the IC title. This feud MUST happen IMO. And it must last ATLEAST 4 months.
Here is my take at the WHOLE card.
Opener - Shawn Michaels vs. Ric Flair - Great Opener from two pros. Shawn wins, Flair's final match.
Super Crazy, Chavo, Wang Yang, Noble, Moore, & Helms in a Huge Cruserweight free-for-all for the title. Chavo or Helms wins.
Womens 3-way Match from Hell. - Mickie James.
Ladder Match - Hardy or MVP wins.
CM. Punk vs. John Morrison for the ECW title. CM Punk. I know him from way back.
Lashley vs. Batista - DQ or something that allows both to come away looking good. Maybe a Mark Henry/Kane/Snitzky run in.
Edge vs. Taker for the World Title. Edge stops Takers streak and steals the title.
Kennedy vs. Jericho for the IC title. Jericho wins.
HHH vs Orton for the WWE title. HHH finally has his shining Wrestlemania moment as a face. Then turns heel before Summerslam.
That should be 3 hours that is worth my $50.