According to andriasang.com, this weeks Famitsu contains an interview with Tetsuya Nomura regarding Kingdom Hearts 3D: Dream Drop Distance. In the article, Nomura comments that Dream Drop Distance is "60 to 70 percent complete and due out in Spring 2012". Our translator sqexgal has translated some of the interview contents from Honkanko-Alt. You can read the whole translation at our forum. We suggest you do this, because it is quite long. The scans below are thanks to Toma_Kisaragi and KHInsider.
EDIT: We now have the complete interview up on our forum thanks to sqexgal. Please click here to read it. Interesting, Nomura states that there will be multiplayer functions in KH3D.