I'm still trying to work out who's up next on the CD train. I'm almost 100% sure that Kirari will be part of the next group, if not spearheading it, and that Riina Tada will also be in it. (Because she's the non-main game idol with the most cards at 6, only topped off by Chihaya with 15 and Miki, Yayoi, and Haruka, all at 13.) After that, I'm going to guess we'll be getting Mika Jougasaki because her sister is in the current group. Also Miho Kohinata because she seems popular.
After that, though, I'm lost. I'm not sure who's popular beyond the girls already done and the four I just mentioned. I really want to say Yui, but that would use three passion to one each of cool and cute, which I don't think they'll do. I mean, the last one, they had two cute, two cool, and one passion. So this next time (if it happens) will probably have Mika and Kirari as the Passion girls, Miho as one Cute, and Riina as one Cool.
... So, in short, my lineup is:
Kirari Moroboshi
Mika Jougaski
Miho Kohinata
Miku Maekawa (?)
Riina Tada
Thoughts?
Edit:
Forgot about Miku Maekawa. She seems popular. Added her, with a question mark, since I'm not so sure...