I seriously doubt that we will be seeing lostgars winning states. I can see them doing very well in swiss, but once in top cut, as soon as they lose a single round in the bo3, they're probably done.
I can see luxchomp winning the most, followed right behind dialga, then sablelock and vilegar. Gyarados will make a showing, and probably will cut, but I just don't think it'll win.