Daniel Bryan is currently my pick, unless they want a riot like last year when big Dave won it. Sting might appear to help Bryan get the win. My outside pic would be Ambrose, he's not really featured in the Rumble build so could be a bit of a swerve?
And on the title match, Brock Lesnar, I think?! They seem to be slowly working on a possible Heyman/Lesnar split, but I think this is too soon for it to reach a head. If Heyman turns on him and takes on Seth, then a heel Rollins vs face Lesnar at WM could be interesting.
The rest of the card is almost unbelievably bad though, New Day, Ascension, Diva's? The Mizdow match will only be worth watching if they let Sandow have the spotlight and win the titles for himself.