possibly Non-Disclosure Agreements are in effect. I actually read the Spanish gaming news website article and they were really straight forward that the next installment of the mix of Pokemon Grey/Gray is not coming out. Depending on the what Nintendo is planning, it may be because of the 3DS being really new and doesn't know how it will be effective on the next release of Pokemon. It's like how Shigeru Miyamoto is planning on the next Mario game for the 3DS to get a good gameplay like the New Super Mario Bros. on the DS.