It actually works out best that Jerry won I think.
They've been booking Miz as a beatable champion for a while now, always getting help one way or another. It was pretty much a known fact that he's going to be defending the title at WM (and looking more and more like vs Cena).
So Cena was out (as it'd be difficult to have him defend vs Cena at EC and then go 1v1 at WM), Sheamus was out (They never do heel v heel), R-Truth was obviously out, and Orton and Punk are penciled in to face each other at WM as well. This left King and Morrison.
Morrison is someone they've been booking as a slow progression in an attempt to make him an even bigger face than he is and to give him a bit more time to develop on the mic. When Morrison gets his shot, I think it'll be as a Royal Rumble winner or MITB. If they drag it out with him getting a shot to contend for it here and there (like he'll have at EC), it'll gives the fans a feeling of emotional investment when he finally gets there and the pop will be huge. Sure, Miz/Morrison has so good history and they've already had a great match this year, but they can push that off for a bit.
The King booking works great. He gets his match at EC where Cole stops him from winning the title again - thereby solidifying Miz as a "beatable" champion - and turns into a King v Cole WM match (which gives King a WM match he's never had, and can bring forth a conclusion to this whole "King you cant touch me or youre fired" angle between the two.
Then at WM, after a great build up with solid promos by each of them,Miz can cleanly beat Cena on the biggest stage there is - solidifying himself as a legit main eventer for years to come.
I like it, and I think it's going to work out great.