#1 It's not an actual retirement

As we were writing this, we learned that the "host" of Rey Mysterio's retirement ceremony will be none other than the man to seemingly retire him - Seth Rollins. While Rollins and Mysterio have crossed paths before earlier this year, we can't help but feel that this is all going to lead to a major high-stakes PPV match-up.
Look who just shut down all of Tony Khan's critics! More HERE.
While the segment may start with a Mysterio retirement announcement, there's a very high possibility of it ending with a fake retirement and Mysterio's return. Ultimately, the goal of this seems to be a Rollins vs Mysterio match-up, even if Aleister Black has a prominent role.
Aleister Black vs Seth Rollins seems to be a good direction as well, but it might have to wait for another couple of months. This also means that Black could end up being a side character along with Humberto Carrillo.
Either way, we're quite convinced that the retirement is a work and that Mysterio will lay the smackdown on Seth Rollins.