Yes, I think that nintendo will make another pokemon game
just theres a twist:
notice taht nintendo release yellow later red and blue
and how nintendo released crystal later than gold and silver
and how emerald was released later than ruby and sapphire
u notice how they all are the same game? right the sequels so to speak
well i think that nintendo will continue that pattern and make a game that is the same thing as diamond and pearl but posibly combine the two legendaries together.