I like the Idea that they have one big fat guy (Vis) and one big, tall monster (Khali.) I think because Raw has more people that seem likely to win the Rumble, that they are naturally going to have more wrestlers in there. ECW has as much chance of winning the Rumble as the Great Khali does at joining DX. SmackDown has dominated the Rumble in recent years, so I expect a Raw guy to win it as they need an established contender. Super Crazy will be in there for about 5 minutes and explode in with high flying moves. They don't have many Cruiserweights in there so I think that is why they have him there. I expect Mercury to be involved in the match. Possibly managing Nitro or costing one of the Hardys the match. I don't think that he wants to do to much wrestling with his face issue, so that is why I don't think he would want to be in the Rumble.
I think Miz fills the joke competitor, but I think Vito would be better at that. It is interesting that Holly is in the Rumble, but I don't think he will last long.
I don't think that Kendrick and London will be a part of the match because I think they are focusing on the Hardys/MNM feud. I think that a good idea for the money in the bank match would be to have a triple threat tag match between the three teams, where the winning team both get shots at the World Title. Although Vince doesn't want MNM and The Hardys teaming so it is probably unlikely to see.
I think it just shows that the WWE is trying to promote Raw as the best brand so that is why you see an uneven amount of wrestlers in there.