I think they've really left us guessing (and in a good way) with so many possibilities.
If we go down the 'predictable' route does that mean were going to get The Rock as WWE Champion for 2 months from Royal Rumble to WrestleMania 29?!
I honestly wouldn't rule out Rock losing because surely he can't make that schedule of being Champ for two months, I actually think CM Punk might just
(after he wins the title back at HIAC) carry the WWE title into WrestleMania and drop it to someone(Not Rock, Maybe not even Cena).
I can see Brock Lesnar costing Rock the match at the Rumble which then sets that match up for WrestleMania even in a non title match, or if they want it to be a Title match Brock wins the Rumble and Rock wins the title.
I can also see WWE doing Cena vs Punk at WrestleMania (again might not be for the title in a Who is really the best
lots and lots of possibilities and some I haven't even mentioned.