Worried about graduation & advancement in 2028

First off, in 2028, the characters in Project Sekai are graduating and advancing, so graduation cards will be released, right? They're not saying who it is, but if it goes well, it's a sad farewell, and if it goes badly, it'll be a mud-slinging match with fans of other rhythm games. They probably have characters who have already graduated, but in two years, when we graduate and advance, we might get into arguments about 'plagiarized graduation cards' or 'the concept is the same'. Honestly, I've seen a few of their game fans' 'honest opinions', and the remarks are way too extreme. They even bring in other genres and insist it's plagiarism, and I don't understand why they're doing that, for real. Of course, I know we can't expect good things to be said if we're in the wrong, but it's just baffling that they curse every other word and drag in other genres, claiming plagiarism for concepts and such. They could just focus on their own units, but I can't even grasp how much they want to bash Project Sekai. Honestly, looking at both Project Sekai and the fans of that other rhythm game, neither side has done anything right. They just want to bash each other somehow, and it seems like they make 'honest opinion' videos way too easily. I'm posting this knowing I might get criticized. I hope the worries I'm concerned about don't come true. Enjoy the game☆