This Corocoro scan features an interview with the three main people, the producer (Tsunegazashi Ishihara), the director (Jyunichishi Masuda), and the art/graphic director (Kenshi Sugimori), involved in the development of D/P.
What we know about D/P from this interview:
1) DS is confirmed to be the platform for D/P, and like before, both games will come out together
2) The games will be able to connect with both the GBA and GC, and the producer said they will be compatible with all the GBA games released so far (he didn't mention Colosseum and XD in particular, but it's granted that they might be too), and you can transfer all the pokemon you worked hard on in R/S/E/FR/LG to D/P (most likely there will be limitations like you can't trade before you beat something in D/P, although it isn't mentioned)
3) Neither of the three men specified the exact number of new pokemons, but they just say there will be a lot, including both pre-evo and new evo of existing pokemons
4) The new pokemons revealed so far like Munchlax and Rukario will be in the games, though they still haven't finalized how their roles will be. Corocoro's small bracket quote states that the same pokemon usually plays a different role in the movies and in the games
5) D/P takes place in a completely different new region compared with Kanto, Johto and Hoenn. However, this new region's inhabitants will certainly include existing pokemons. The Corocoro quote wonders if it will be a high-tech region like Orre in XD
6) How the opening sequence of D/P will be remains undecided. Up to R/S/E, players pick one out of three starters and add 5 more members to build their team. The three men didn't mention if this trend will change, but said everything is still under discussion
7) About the new features of DS, the producer mentioned that D/P will make use of DS's capability of linking 16 players together, and will most likely make use of the touch-screen function like Dash
8) The producer confirms that there will not be new types, but there will be new type combinations, like Rukario's steel/fighting combo type
9) Pokemon Ranger - The Path to Diamond and Pearl, will be a project released in 2006 that goes in conjunction with the new movie and anime (it doesn't mean they will come out together, just that all these new pokemon stuff will all enter the pokemon world in 2006, and complement each other). The Corocoro quote mentions that the preview of next year's movie (probably shown during movie 8) will feature this Pokemon Ranger title.
*Now, there is no real proof that this is a game, so I'll just call it a project from the literal Japanese translation, although this Japanese term is often used to describe games. Since Corocoro calls it the new project aside from D/P, chances are it is a game.
Finally, at the top left corner, D/P will come out in 2006, without a set date or price yet.
Coronis~
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