IF Daniel Bryan faces Triple H at WrestleMania XXX and loses, then I honestly think that would go a long way in hurting Bryan's momentum. Fans are behind him and have been behind him especially since Trips screwed him over at SummerSlam, so it's natural they want to see some sort of payoff. WrestleMania XXX is the biggest show of the year and if said payoff not only doesn't happen there but Bryan loses to Trips, then I do think there's a good possibility in a lot of fans just throwing up their hands and declaring they're done with it. Off & on since SummerSlam, there've been teases of Bryan getting his hands on Triple H; if it happens at WrestleMania and Bryan doesn't win, then I think it's over for Bryan as a potential main event level player. The Authority have called Bryan a "B+ Player" for the past half year and Triple H going over Bryan in a match at an event where it'd be the most opportune time for Bryan to have a huge moment could very well solidify it. The payoff for Bryan vs. Triple H would be Bryan winning and proving that he's an "A Player." It's also an opportune time for one of the biggest stars in the history of the company to give a major rub to a much younger guy that can help carry the company going into the next decade. If it doesn't happen at WrestleMania, then I don't think it will be coming period.
As someone else said, however, you have to take a lot of what's said in the dirtsheets with a grain of salt and that goes especially for anything concerning WrestleMania. For instance, yesterday I read a report in which Dave Meltzer states that WWE plans on pushing Cena & Bryan as the top two guys coming out of WrestleMania. IF that turns out to be the plan, then I don't see Bryan jobbing at WrestleMania.
I honestly don't see why some think it foolish to expect Bryan to go over Triple H. He's red hot, has been for half a year, he's massively over, he draws well for the company, makes money. If Triple H AND Shawn Michaels both put over Chris Benoit at WrestleMania XX, someone that never came remotely close to being as over as Bryan is, then I fail to see what's so hard to believe about Bryan going over.