The Scribblenauts franchise has been fairly successful for Warner Bros. Interactive and developer 5th Cell so it stands to reason that the series would continue. Warner Bros has registered a site domain for something called "Scribblenauts Remix."
Warner Bros. haven't commented on whether this is a third game in the Scribblenauts series, an upgraded version of Super Scribblenauts or whether if it is indeed for the Nintendo DS platform. There's not much more to go on at this point so we can let our imagination run wild with potentially crazy ideas. A Scribblenauts game for consoles? Or perhaps the more sane plan is for this to be a Nintendo 3DS game or even PlayStation Vita. Yes, that makes more sense.