I'm definitely excited for this angle and what will come of it, it's going to be hard to avoid those Smackdown spoilers this week, but it'll be worth it as this angle could be explosive to watch.
If I had to make a prediction, I'd say Vickie and Dolph start the show off and say that they demand Edge to come down to the ring to turn over the World Heavyweight Championship to Dolph Ziggler. After some anticipation builds, Edge's music hits and he slowly makes his way down to the ring with a confident look on his face. He teases handing over the belt a few times, before putting it back on his shoulder. Vickie says that Edge has left her no choice, and then The Corre hit the ring and subdue Edge, but Big Show and a few Smackdown faces come out for the save. Edge manages to hold onto the belt, but this sets up another match with a ridiculous stipulation for Edge, but he manages to pull out another victory.
With that whole set up on RAW where Del Rio picked Edge over Miz, I think it's safe to say that the WWE wants to have Del Rio vs. Edge at Mania. It's possible that they throw another name in there, but I sincerely doubt it, as Christian is no where to be found and Dolph Ziggler could be better utilized in another match.