The following information is taken from the October issue of Arcadia Magazine, and has been reported by @jubeat_uo_info:

  • Song Swap: Every month, about 15-20 songs (including originals AND licenses) will be swapped out with others. Users will be able to request a revival via e-amuse GATE.
  • The new unlock system will be called bistro saucer:
    • Each unlock is a meal composed of multiple ingredients.
    • You collect an ingredient with each song you play.
    • After each play session, you cook what you can with the ingredient you've accumulated.
    • Each unlock may have a different amount of required ingredients.
    • New unlocks will be pushed on a monthly basis.
  • There are new types of featured songs:
    • "Only for Now Tracks" (Ima dake gakkyoku), which are only available for a limited time and are then only available through bistro saucer or a later update
    • Today’s Full Combo Challenge Song, which changes every day, and gives you an extra ingredient if you full combo it.
  • New tracks have been announced:
    • フーフローツ / Nanako
    • NIGHT FLIGHT / 小野秀幸
    • 我が麗しのバレンシア / 劇団レコード feat. Mille Face
    • Baby Bleep March / seiya-murai
  • jubeat saucer’s theme will be rainbow-colored.

There is some information that seems pretty fuzzy to me, like added details in the tweet about the daily full combo challenge and something about "plate songs" in bistro saucer, so if it makes any sense to you, please get in touch and explain it to me.

I'm sorry this information is almost a week late; I somehow didn't see it go by. Doesn't seem like anyone else picked it up though.