User blog comment:Esten Kei/THEORY - Is JD2019 holding a big surprise?/@comment-33320163-20180625163752

I mean I dont think you're far off with that, but here's what I believe.

The reason why they have these 3 or 4 same themed-songs is probably to make more playlists, which they are trying to shove in our faces now. I'd love a story mode though.