Is there going to be a new game for pokemon on ds?

is there going to be new for pokemon diamond and pearl like da one last time (gold and silver = crystal) (ruby and saphire =emarold) somebody help me out cus i jus got into pokemon diamond and i want to know if im going to have totrade my pokemon or not cus i heard somebody said (pokemon dream =darkria )and one ofr giratina ? somebody tell me