True , but by the time Diva X is out , wouldn't it be too late ?it's not like they can't just skip it and then promote the next one.
Sega might be better off to release Future Tone further off in the west, I think they are a little crazy as is, releasing it so close to X in Japan, and before it at that. Looking at the game, I could totally see myself having plenty of PD to play just with Future Tone for quite a long time after X.
To me, it makes total sense to release FT after X, I wouldn't be surprised to see it released next year in NA.
Edit: found someone who uploaded a recent Sega stream about FT to youtube:
https://www.youtube.com/playlist?list=PLah1IV25cVGVUtLSOIORfrOxpFhWBRcdN
It's all in Japanese unfortunately, and I'm only understanding half of it, but reading through, it almost seems like the head swapping and survival mode features are DLC? I can't tell if they mean DLC for Prelude (so included in the full game) or DLC for the full game (as in, purchased separately).