I picked 80-90%. Daniel Bryan winning the title isn't the problem. I think him beating John Cena is a HUGE possibility. No excuse why he shouldn't. Wrestling wise, he's the best talent on the roster as a in-ring technician, cuts decent to good promos, and the most over character there is. Business wise, he sells shirts, other types of merchandise, and appeals to ALL AGES. Kids love him, females love him, males love him, INTERNET FANS (the hardest to please) love him, and his fanbase continues to grow every day. Here's the best part, John Cena for the first time since .... Punk? Ever? ... He isn't the UNDERDOG in the match. He is the odds on favorite. Guess what? That just raises the steaks more for Bryan.
Now, if you were to ask me the percentage of Daniel Bryan WALKING OUT of Summerslam as champion, I would have said 40-50%. One reason -- Randy Orton cash in and heel turn. Sure, Daniel Bryan could conquer ONE mountain. Him conquering TWO mountains is highly unlikely. If Orton cashes in after his match against Cena, Bryan is most likely going to lose that title, sadly.