WrestleMania XXX is way too long. If he fails to win the WWE title until then, he becomes like Ryback where he has all of this momentum and then loses it instantly.
Ryback's "fall" was more about consistently losing month after month than it was about his not winning the title. So long as Bryan doesn't consistently lose between now and 'Mania, then he should be just fine in terms of maintaining his momentum. There are plenty of ways to keep him winning - and to keep him invested in the Orton/TripleH story line - without having him actually wrestle Orton for the belt.
Realistically, this isn't a difficult task to accomplish since the people in charge have made it clear that they don't want Bryan near the title. That being the case, forget about the re-match at NOC. Booking Bryan in a re-match with Orton would put their stated goal from last night at risk - to preserve the integrity of the company by keeping the belt off Bryan. Besides, the furthering of this feud is less reliant on Bryan feuding with Orton as it is on Bryan feuding with the McMahon's.
So instead of a re-match with Orton, the McMahon's will put the B+ wrestler in a match for a B+ Championship - and have him go against one of his attackers from last night, Dean Ambrose, for the US Title.
Bryan would win the belt at NOC, and then go on to defend the belt against Ambrose at Battleground. During this program, he will continue to draw the ire of the McMahon family by belittling them. He will retain the title at Battleground despite Shield interference, but the McMahon's will make sure he doesn't retain at Hell in a Cell - by adding an unbeatable stipulation to the match.
This will lead into Survivor Series as Bryan will team with Big Show and Henry (possibly the Tag Team Champs at this point) and Dolph Ziggler (his punishment last night leads me to believe it could continue in the coming weeks/months) to take on Orton and The Shield in a traditional S.S. match. Bryan will be the lone survivor in this match and get the pin over Orton.
With the big win over Orton, Triple H will congratulate Bryan - telling him that he proved the doubters wrong, and that he earned his re-match ... for the US Title. He'll then book a Fatal 4-Way between Bryan and The Shield at TLC for the US Title, a match which Ambrose will win.
We are now at the Royal Rumble - and the WWE can go one of two ways with this ... They can either have Bryan win the Rumble, guaranteeing his spot against Orton at 'Mania ... or they can continue to screw Bryan and let him win his spot at the EC in February. Either way, they've booked Bryan vs Orton for WrestleMania.
On the other side of the coin, I'd book Big Show vs Orton at NOC. Big Show will not flinch to accept the spot, but realizing that Bryan deserves the spot, he'll promise him first crack at the belt when he wins it. This gesture will piss off the McMahon's, and they'll "enlist" the services of The Shield to help Orton retain the belt ---- that move will lead to The Shield defending the titles against Show and Henry in October ... Ziggler and Bryan will make the save to help Show fend off the 4-on-1 attack.
Ziggler will get the next crack at the belt during both September pay-per views due to his involvement in the main event at NOC. There will be a screwy finish to the first match at Battleground (eg. the ref will be distracted as Ziggler is pinning Orton. Ziggler will be defeated by outside interference.) Ziggler will goad Orton into a re-match three weeks later at HIAC, which he'll lose.
That will lead into Survivor Series, which will feature Bryan, Ziggler, Show and Henry vs Orton and The Shield.
Orton could distance himself from this large program at TLC and the Rumble with any number of opponents - Ziggler, RVD, Christian, etc... Though Orton's final stretch to WrestleMania season won't be anything to write home about, December and January have been filler in terms of the WWE/WHC Titles for the past 10 years (last year being an exception.)