we can expect ayakas moving on without you and miliyahs automatic on this i think
moreover we can assume that there will be a live or even a studio version of shiina ringos traveling cover...
I also do think that JUJU will get the spotlight with her First love...
The tribute album is a decicion of Utadas manager, hower, she handpicked the songs (or at least was involved) and said something like---that she leave the interpretation of the songs to singer-songwriters...
I'm pretty sure we will get mostly high-class artist (similiar to YUIs album), or at least well known ones....
maybe Namie will do kettobase again