They are certainly giving him the chance. I never in all my years thought anyone would have the opportunity the wrestle two matches at Mania after WM10. He is packaged as a superb submission mat wrestler Ala the excellence of execution. He kind of has the underdog thing going which Bret really didn't have going into his runs with the belt but the similarities are there.
In my opinion Bryan will find away to get a clean win over HHH but will then get jobbed out of the title later that night. Bautista will walk out of Mania with the belt as a MASSIVE heel and Authority/Corporation shill. Orton will get another turn and be a tweener face. Bryan and Orton will feud with Bautista and the Authority all the way up until Summerslam.
The long con continues.
That being said...D Bry is going to have a very long run with that belt eventually. Maybe from Summerslam through WM31.
I don't see any other similarities between him and Hart. I also think a SummerSlam to WM31 reign would be terrible. He (his character and his popularity) doesn't have that kind of stamina.
As a long-time wrestling fan, I have seen great long-term angles done right with big payoffs (ex. Hogan/Savage) and have seen great long-term angles done horribly wrong with watered-down payoffs (ex. Hogan/Sting) It is my opinion that anything other than a Bryan title win at Mania will be a horrible swing-and-a-miss on WWE's part.
I said on another recent post that Bryan had a very small window to strike while the iron was hot. I also feel his HUGE popularity (not his career or popularity as a whole), but this Yes-movement-type HUGE popularity, will fizzle by the end of 2014--and wouldn't surprise me if it was sooner. I feel this storyline's wave is carrying to great heights a very good wrestler, but a very mediocre character. You can only pull for an underdog who continuously gets screwed for so long before giving up on it.
I feel he HAS TO win at Mania. After that, if they want to try another angle or use his still-hot popularity to create a mega-heel, that is fine. But having this mega-heel Batista move (as you said) would be a horrible waste and a terribly wasted opportunity at, not only a Mania, but a milestone Mania.
The angle started to get old between SummerSlam and Royal Rumble for me. But, WWE has done this beautfully along the Road to WrestleMania. They kept his character down, but his popularity up. They gave him momentum going into the big event. They HAVE TO give the fans the big payoff. It is the only way to go.
Like I said, once you give him (and the fans) that moment, it is there forever--it will always be the night Daniel Bryan's underdog reached his goal. AFTERWARDS, you can use his still-hot (but soon to be fading, since he is no longer the underdog) popularity and create a mega heel by screwing or cheating him out of it. It will then be on that heel to ride that wave into greater things. Bryan will then have to find something else for himself. But, that is all down the line.
What is right for this moment now is to have Bryan win the title at Mania and fade to black during a GIANT YES chant. If they have him lose--whether it is Punk-related or anything else--it will water down the eventual payoff and ruin what has been beautifully built thus far.
I think WWE knows exactly what it is doing and is doing it the right way.