Older girls at least. Kanami and Nocchi are the oldest eggs (known?). So, it's likely Nocchi may be in a new group at some point like Yui, who was the oldest. I'd just like to see an all Egg singing group releasing, but I know you would, too
For all we know, we could have some Enna/Kanami duets or solos on that Tsunku Theatre album
I like Aina, too, so hopefully something of her~ A trio song?