As everyone remembers Kane had a big fued with Taker over the world title. Undertaker as I remember got injured right before Bragging Rights 2010.
He lost the match to Kane at Bragging Rights in a buried alive match and vanished until Mania season.
So my question to you is what do you think would have happened if Undertaker had not been injured?
Well the Smackdown roster was pretty weak at that point. To make up for Taker's loss, WWE turned Edge face and moved him back to Smackdown just to fill the empty spot.
The top heels on Smackdown would have been
Kane, Alberto Del Rio, Jack Swagger and Dolph Ziggler, and those last two were stuck in IC title scene.
The roster was so weak, that even though Del Rio was feuding with Rey at the time, WWE decided to combine that feud with Edge/Kane to made it a Fatal-4-Way at TLC.
After that, WWE moved Dolph up the card and gave him a push against Edge for the World title. I'm guessing the same would have happened had Taker stuck around. Taker beats Kane for the title, and feuds with Dolph Ziggler for Royal Rumble.
I think they were building towards an
Undertaker vs. Alberto Del Rio match at WrestleMania. Remember, Triple H was supposed to feud with King Sheamus in a King vs. King match at WrestleMania, so it would have been in the cards.
Del Rio wins the Rumble, challenges Taker for the World title, and makes it seem like it's his destiny to end the streak. He fails though, just like he did anyway when he faced Edge. Anticlimactic? Sure. But it was never the plan to give Del Rio the WrestleMania win.