You're right, we just need to write Judgment Day as this years December to Dismember. So we go from a potential Hell in the Cell with the Undertaker, it didn't matter who the other guy was, it's a Cell with Taker, and oh ya, Big Dave Dudd, to a possible John Cena vs. Great Khali matchup at the end of the show, yikes. A rematch from Backlash with the McMahon's and Umaga vs. Bubby Leslie. Edge winning the MITB and getting involved in a hotshot angle with Big Dave Dudd is good, because as long as its a oneshot hotshot deal, and you don't weigh Edge down with Dead weight, I'm all for it.
Now onto your Question grizzly about Christian and how this would have affected him, tough to say, but I'm starting to believe he would be reaching Main Event status in WWE on default alone. He would be entering his 9th year with the company if he stayed. You never know if the CLB would have gotten a fair chance at the main event scene.
Another Question now, and this is a serious one, Kennedy, two major injuries in 18 months. They put the MITB on him, most likely he's going to win the Rumble to get his shot back, but if you are the WWE, do you risk putting a major title on him before he can prove he can stay healthy?