I already made a prediction about the ITZY cb. Now I'm going to tell you about STAYC.
In STAYC's comeback or even within 3 months, there will be a viral moment that gets the group to become very popular. Of course it won't be Brave Girls level viral, but something that puts STAYC way ahead of many 4 gen groups.
It could involve either Yoon, Seeun or Sumin, or at least those are the main 3 likely to be involved.