My personal opinion in this matter is this.
This match has the ability to be a match-of-the-night showing. All three wrestlers have talent, & unique moves. Yes, I'm like most in agreeing that Elijah Burke (or for me, even Kevin Thorn) should've been added instead of The Miz.. but this (to me) is going back to the fans choice.
The "fan's" picked The Miz, to get the Championship match. Somehow I have a feeling that had the fans picked Morrison, it'd of ended up the same result. With this being a Triple Threat. But in all honesty, had the fans of picked Big Daddy V.. I think he'd be the Miz's replacement in this match. So I'm thankful we have 3 seemingly talented athletes in this match. They all have the ability to capitalize off each other's moves. So it could be a great match. (here's to hoping, anyways)
As far as the ending. I don't see The Miz winning the Championship, which could be a highly, as Survivor Series is known for having big shocker moments.
But ultimately, I either see John Morrison regaining the Championship (which was what has been planned for a while) by pinning The Miz. Or, I see C.M. Punk picking up the victory, over The Miz, leaving yet another finale match to the Punk/Morrison rivalry.. which, (shear hope that's less than a dream now) could be a ladder match at Armageddon.
I WANT John Morrison to regain the Championship, because he has a better gimmick with more fan reaction than C.M. Punk. Yes, Punk has fans, but those fans aren't reacting big enough for him to remain in the Main Event. Last year at this time, people went WILD for Punk.. now, they're barely holding themselves from using his matches as bathroom breaks. Morrison could have the same said for him, but that not withstanding, he still grabs more heat from the fans.. more reaction in general, than Punk. It really wouldn't hurt Morrison to realign himself back with Melina, either.