Also wanting Cena/Taker at WM 29 - assuming Cena lost that would be two WM PPV losses in a row but they could work a Cena/Rock title picture for WM 30 with him holding the belt up to close the anniversary show plus they could do Punk/Austin
and as it is the 30th anniversary they could try to get Sting across to face Taker and them both retire on the grandest stage of them of them all, plus get Hogan in as a guest host (don't know about his contract situation with TNA however)
So you could have a stacked card for WM 30 and still have a massive one for this year with Cena/Taker, Brock/Rock and maybe Punk/HHH or some sort of tag match involving them and the Shield
there's so much they could do with this if they don't go down the predictable road
These are the best main events they can give us I think.
It clearly means that it was supposed to be Rock vs. Cena for the WWE Championship at the Royal Rumble, not Wrestlemania. Why would the Wrestlemania main event be a selling-point for a Royal Rumble DVD?