Yeah of course. Diamond and Pearl will be the next Generation games for DS. Will include all new Pokemon like Munchlax (Gonbe) and Rukario, so it may be a new Region too!
Please keep all questions and speculation about Diamond/Pearl in the Speculation thread. All that is currently known about D/P is that they feature Munchlax, it is for the DS, and will probably feature Rukario/Lucario.