It shouldn't be too long for us to know more details about the new tour. Last year we got news for the Best Single Collection Tour on 12.14.
http://rhythmzone.net/koda/news/detail.php?id=1029948
Maybe in one month we'll get information about the new release, I don't know.
@KuuXAyu-fan A 5 or 10 seconds preview of an upbeat song with her saying "gimme gimme now" I think. haha