>>36106228Off the top of my head:
There was an interview way back in January where Miko said that they had recorded Kimagure Mercy, but asked fans to please be patient as it will be released some time later; Suisei way later, like during summer, said on some occasion that she had one finished recording that was still waiting for release.
There was also an interview with INOTAC and DECO*27 where they both said they watch MiComet, enjoyed working with them in previous projects, and talked how nice it would be for the two of them to collab which people took to mean that they were hinting at a future orisong. And after her album came out, four out of five songs Suisei has released have been jointly with another chuuba, so there is a pattern.