First, major soft visual 90s/00s band Dear Loving, who recently revived, have joined the cast! Hopefully they'll get some fans in the door.
Second, one of the guitarists for the Matina ALL STARS (魔帝那オールスターズ) session band has been announced: Ryuto (龍兎) [ex-Saruin, lolita23q (少女-ロリヰタ-23区), the LOTUS]. There's not really a Matina connection, except that lolita23q did a photobook with KISAKI once... I guess. The second guitarist is still TBA.
Third, the event will have an opening act: Sclaim. Not sure why tbh, but they don't sound bad. Here's a sample from their YouTube:
Finally... new music will be released at the event!!
There's not much information yet―presumably it will be a CD by MIRAGE, but even that's not specified by the text―except that the new music release will be live-limited. Hopefully it will pop up for purchase afterward!