Please, don't bring back FLOW. Unless they come back like Momoi keeps coming back (I really do love that!)
Aside from the fact have zero interest in FLOW and don't care for their music....
We need variation! I was going to try to catch Yuya (not exactly my favorite music either, but it seemed fun enough) but was too starving to after my Yoshiki fest.
I don't really have a particular suggestion, but I would like to see some showy J-Pop or something. I'll be honest, I won't be super into any of the bands that come, my J-rock fandom days are kind of over, but if a band is going to put on a really fun performance and I am okay with their music.... I'll go!
I'd really like to go to musicfest again! So stop bringing FLOW.