Current listed name: Beatmania IIDX 16 Empress + Premium Best
Release Date: October 15th 2009
Console: Playstation 2
Confirmed Songlist: 185 confirmed songs! (This doesn't include Sirius Preview songs which are confirmed, or possible 5 key transplants and CS premieres Konami has planned)
List Price: 7980 yen
Other Notes: The Dengeki article confirms that this is going to be the last IIDX release on PStwo and that it will be on 2 DVDs. Both discs will use the Empress theme.

Update: Foundation of our love and Pink Rose were listed for this release, but were recently remove from the listings on the official site and now The Shining Polaris and たまゆら (Tamayura) appear in their place. Both songs were not in Empress AC so that's a little surprising. Also, I've put up my theory on what songs will be on what disc.
Possible Disc Information:
Disc 1: (Currently 86 songs based on Konami's product page. CS Premieres, 5 Key transplants, and Sirius Preview Songs might be on this disc.)
All Empress Arcade Songs
Inferno
Nageki No Ki
CaptivAte -浄化-
Garden
Poodle
Rage Against Usual
月光 (Gekkou)
Mei
AA
D.A.N.C.E.!
Genocide
gigadelic
Scorpion Fire
DoLL
Lucy
One More Lovely
lights
moon_child
one or eight
quasar
Really Love
Blame
Love is Orange
Monkey Dance
Xenon
Love Will
Holic
The Safari
Dancin Into The Night
The Shining Polaris
たまゆら
Disc 2: (Everything up to Innocent Walls is likely confirmed for this disc due to preview screens)
All 3 Scripted Connection Mixes
Stoic
The Deep Striker
The Dirty of Loudness
Time to Air
V
Waxing and Wanding
Xepher
Laser Cruster
Mendes
Vanessa
Innocent Walls
All confirmed revivals that aren't listed for Disc 1