'Tis truly a sad day in the IWC. From a fan's perspective, I hope this is a work like Mark Henry's retirement. But considering how much Daniel Bryan has done himself, as well as how he has changed the perception of smaller wrestlers, and also that he isn't in the best shape (a massive understatement), I understand completely why he'd want to do it.
I mean, when the NJPW guys were confirmed, I'm sure Bryan posted a tweet saying he wanted WWE to clear him so he could wrestle them, so I'm having a hard time believing that this is entirely legit.