Yesterday afternoon (US time), BAM! Marketing, Publicity & Promotions sent out a press release, that only said: "Mark your calenders! One night only!" followed by X-Japan, Hollywood, CA and 01-09-2010.

Also, Navigate Hollywood has announced that a section of Hollywood Boulevard, between Highland Ave. and Orange Dr. in Los Angels will be closed from 10pm on January 9th until 7am next morning for "X Japan filming". No other details are provided yet, so it might be a PV, an open-air live or something completely else. We will update you as soon as new information becomes available!

Sources: Japanator.com and Navigate Hollywood