At this point it is a completely unconfirmed rumor, so keep that in mind. But Scott Keith reports that according to a reader, Daniel Bryan is in Los Angeles for Hell in a Cell.
Keith’s site quotes the fan as saying that he was on a flight with Bryan and “chatted him up,” pretending to be a neurologist. Bryan allegedly told the fan that he had just been cleared from a concussion and was “going back to work” today.
Obviously none of this has any level of confirmation. We’ll likely know more as we get closer to the event today.