What are the chances that Daniel Bryan returns to wrestling once his WWE contract is up? He seems to feel that he’s been cleared by enough doctors to wrestle. He has even said "They won’t let me" (on Talking Smack, I believe) in reference to the WWE’s refusal to clear him.
Once his contract expires? Pretty much 100%. But even then, chances are equally good that WWE will throw a LOT of money at him to re-sign him, because if he leaves and something happens to him from a CTE standpoint, that can still be traced back to his WWE run later on. So it might be worth it from a legal standpoint to pay him more to stay and do nothing. Whether Bryan would take that money, I dunno. I tend to doubt it.