In this video, album art, track lists, and pricing have been unveiled. BURIAL will contain 5 tracks, two of which are new songs (granted, the first one sounds like an instrumental introduction), two are rerecordings of older MIRAGE songs, and the last track shall remain a mystery until the CD has been officially released.
The songs on LIVE ARCHIVE 1997～1999 were also revealed, and they cover MIRAGE's career pretty evenly.
Both CDs are being produced and distributed by LORELEI Entertainment Group, which apparently uses very similar branding to UNDER CODE. Kisaki also said he is going to be focused on MIRAGE. Maybe this means we'll get some more material later?