I finally had time to watch bits of it and she looked so happy. I don't know if I imagined it but during Gee she looked happier than I've seen her in years.
Somebody said the deal she made with SM after her departure has expired, I don't know if they have a source for that or just made it up but the possibility has some interesting potential. I kept hoping she would drop by during Soshi Tam Tam so something like that would be neat, personally I would be so happy just to see OT9 in the same room together or being able to openly mention each other.
If SM stops blocking it I don't think it's impossible since they know it's something the fans would want, I'm not under any delusion that they all still love each other but they wouldn't need to.