Haha, I've decided to do further research to be 100% sure that the next project, which you claim you've seen footage of, is in fact not KH3. Now READ:
"In a recent interview Kingdom Hearts producer Nomaru discussed an upcoming side-story. The game is expected to focus on characters outside of Sora this time around as Nomura has expressed a great deal of interest into telling the tale of King Mickey and his journey in the World of Darkness and what Mickey had to do while there. Nomura also wants to tell how Mickey was able to obtain the Keyblade.
Nomaru feels as though Roxas needs to be further developed into the universe of Kingdom Hearts. Nomaru said "It is interesting to create in one year, the birth of him, and then next, the disappearance of him."
Nomaru wants the next Kingdom Hearts project to be slightly different from the series. Although he doesn't go into details he does mention the title could appear on either the DS, PSP, or may be even a cell phone. No other details have been revealed but expect new information on this Kingdom Hearts side-quest to be unveiled shortly."
http://www.advancedmn.com/article.php?artid=9702
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"Nomura: It is not Kingdom Hearts III, but it is an anecdote (extra or side-story) work! I think Sora [still] has a big role to fill! So let's focus on other characters other than Sora for the following work now. (Tomo's note: Nope, doesn't mean new outfit for Sora...)
Nomura: I did nothing but talk about "Birth by Sleep". Also, I want to explain what Mickey did in the World of Darkness, and also how he got his keyblade.
Nomura: I have a feeling that I want to work on developing Roxas the most. It is interesting to create in one year, the birth of him, and then next, the disappearance of him.
Nomura: I want to make this [new project] slightly different from the Kingdom Hearts' series, and change the system a little.
Nomura: The multi-developing makes me want to put it on something else, without thinking. If we follow this idea, it would be hard to choose if to make the game for the "PSP", "NDS" or the cell phone."
http://www.kh-2.net/?nav=47861
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Also, Square is not working on more than one project pertaining to KH as you so helplessly wish they were. They are working on just one KH project, and unfortunately for you, it's not KH3. That pretty much destroys your hope of there being a KH3 currently in the works.
Have you anything else to say junior?