I've been imagining Gloria as something gospel-influenced. It would be so cool if she brought the Pride/B&D/BtB/Curtain Call style backing vocals or a big choir back for a truly
big song
If not, it could be a piano ballad or have a organ in it or something. But with her, you never know. (And that's what I love.) SAKURA must be something special, just because it has a japanese name
