While we all know that things can change before WM, the rumored card makes sense. That is not to say that I agree it is the best WWE can give us, because it is not, but lets consider the following...
Batista winning the Rumble seems the only realistic option right now. There is no guarantee Bryan will even be in the RR (from what I have read), and even if he is, the chances of him winning are unlikely, given his match vs. Wyatt. CM Punk is not a logical choice to win because his contract status is up in the air at this point. Hence, WWE is going to play it smart and not invest in Punk as the main event when there is no guarantee he remains with the company past the summer (although I think he will likely sign another 2 year contract). I am sure WWE just paid Batista a large sum of money to return, and given that his return is at the RR itself, WWE is not going to have him lose during his return.
Herein lies the problem with WWE post 2002. It has been increasingly popular over the years to bring back old superstars on a part time basis. The Rock, Jericho, Batista, Lesnar, etc. Personally I hate it. Either you are with the company, or you are not. If you are going to be with the company, put in the work for what you are getting paid. I have little interest in seeing a 45 year old Batista come back and win the Rumble, but it is what it is. They are not bringing Batista back at the RR for any other reason than for him to win it and headline WM. Personally, I believe this is a slap in the face to the full time stars, especially the younger ones. Even a guy like Cena, who has carried the business for 10 years now, has to be disappointed in this. So, Batista v. Orton, will be the main event.
I think we can all agree that it will be Punk v. HHH at WM. There seems to be little doubt and dispute about this.
The other part of the problem is that at Mania, with all the returning stars, WWE has too much superstar power. After those two matches we are left with Cena, Bryan, Taker, Lesnar, Seamus, Shield, Wyatt, Golddust/Cody, Big E, etc. Obviously, you cannot have everyone main event. Bryan is obviously the most over guy in the business right now. I love watching him work. But, I will say that before his feud with Bray Wyatt, he was starting to get old. He does a lot of the same moves in the ring each match. Because Vince and co. do not view him in the same light as guys like Lesnar, Orton, Batista, he will not main event. So, as much as everyone wants him to wrestle for the title, its not gonna happen. He will not be in the main event.
Taker is getting old, so his options are limited.. They are not gonna have him wrestle Bryan because the fans love Bryan way too much. Plus, Bryan just did a face turn, so they are not going to have face v. face. They will throw him in there with Lesnar because Vince and co. believe it will draw the most views. For the same reason, they will not throw Taker v. Cena. They want Taker to wrestle a heel, and Lesnar is the only real option.
This leaves us with Cena, Bryan, Wyatt, Seamus, etc. While I personally hope they come up with something better than Seamus v. Bryan and Cena v. Wyatt, it seems like this is what we are being set up for. Cena deserves better for WM 30. Bray Wyatt is one of the worst wrestlers I have seen, since I started watching again after a 10 year hiatus. His match vs. Kane was probably the worst match I have ever seen. The gimmick is good, but he is terrible.
So, unfortunately this card does seem to make sense. Hopefully creative can make it interesting and switch things around on us...