According to the official site, the following products will be shown:

• Four Warriors of Light: Final Fantasy Gaiden (DS)
• Dragon Quest Monsters Battle Road II (arcade)
• Kingdom Hearts Birth By Sleep (PSP)
• Lord of Vermillion II (arcade)
• Front Mission Evolved (PS3/X360)
• Final Fantasy XI Vana'diel Collection 2 (PS2/X360/PC)
• Final Fantasy XIII (PS3 -- playable)
• Kingdom Hearts Coded (mobile)
• Seiken Densetsu 2 (mobile)
• Final Fantasy Dissidia Universal Tuned (PSP)
• Final Fantasy The Crystal Bearers (Wii)
• Final Fantsay IV The After Years (Wii)
• Final Fantasy XIV (PS3/PC)
• Dragon Quest IX (DS)
• Motto Dragon Quest Fushigi no Dungeon (mobile)

 
Out of all these listed, Front Mission, Seiken Densetsu 2, Final Fantasy XIII, Birth By Sleep, The Crystal Bearers, Four Warriors of Light, and Dragon Quest Fushigi no Dungeon, are playable. Everything else is video-only.
 
 
And maybe some of this will be previewed also. 
 

I was hoping one of the other Fabula Nova Crystallis games would be there too. But that's a nice list.

I wanna see how Front Mission is, and I hope The Crystal Bearers' playable build has more stuff than it did @ E3's limited demo.

There is huge title missing from that list if the rumours are true, but it's meant to be a surprise...
 
http://www.giantbomb.com/kingdom-hearts/62-414/kingdom-hearts-3-preview-at-tgs-09/35-259897/#6

So...Where is Versus? They're still working on that right?

Not much on there for me except the XIII and XIV stuff but God would I love to hear somethin about KH3.

I only care about Kingdom Hearts 3.  Please announce it this year dammit!

When is TGS exactly? You guys think they have enough time to squeeze more in or is it gonna be some big hush hush thing?

" I only care about Kingdom Hearts 3.  Please announce it this year dammit! "