This is a great match, from top to bottom. This is a great match!
What is so great about it, I hear you ask? Well, the simple fact of the matter is that any one of these four men are great contenders to take the Championship. We all know that Edge and Kane have been having their very intense feud on Smackdown. That being said, I don't think that the World Heavyweight Championship needs to be a part of that. They have been doing their own thing so far and it could easily continue without the belt being involved. As for Alberto Del Rio and Rey Mysterio, either of these two men could be worthy Champions. Personally, I think that Alberto Del Rio would make an ideal Champion right now.
That being said, can we really count out Kane? Kane won the Money in the Bank ladder match to pick up the Championship and he's gone on to be a pretty good Champion. I think he has completely redefined himself and the WWE could have enough faith in him to see him through this, probably the most difficult, task. He has had his trials with Edge and I could definitely see this being the culmination of this feud. If so, Edge could be the one to walk away with the Championship.
That being said, the point I am trying to get across is that this match is wide open and that is why this match is probably going to be the best match outside of John Morrison vs. Sheamus. I, for one, cannot wait to see it. My money is on Del Rio though.