The news about Kingdom Hearts: Re:coded possibly being playable at the Tokyo Game Show this year. However, according to a tweet by director Tetsuya Nomura, there will be another Kingdom Hearts title that will receive a trailer at TGS 2010.
“Weather sure is nice. Good morning! Last night I talked with Taba-chan about various things. 3rd Birthday of course as well as about Agito. The staff that played Re:Coded are excited and the anticipation for 3rd Birthday is growing too. It seems the trailer for the other title occuring with Re:Coded is catching a lot of attention.”
Whether or not it's 3rd Birthday or Kingdom Hearts 3D, remains unknown, but a new trailer will be revealed.
Source