SM said they’ll use Aespa to introduce the SMCU, which they already did in that mini trailer. But I saw a bunch of people asking where is part 2 now that Aespa has a comeback again. But obviously Aespa’s musical world is in a different but parallel one to the SMCU, and hence it’s independent from it.
Whatever next part, they are working on it separately and don’t need to follow Aespa’s schedule.