It's of note that Bryan will need a second surgery as doctors believe the nerve injury that was corrected in the surgery in May has a second location. The next surgery will be needed to repair a nerve injury near his elbow. As Brooks noted, Bryan himself stated he only has about half of the strength in his right arm that he has in his left.
As far as WWE is concerned, Bryan is out indefinitely and not in any future creative plans. The directive is clear and that is they want him to get healthy.