Eletons of info about the Adventures of Kai & Zero
Helping you on your adventure are 50 new "Omega Elebits," elemental creatures different from the normal electricity-generating Elebits (who also appear). And they shouldn't cause players to backtrack through the entire game to catch them all. "We didn't want to make Elebits: Adventures of Kai & Zero a game that was too difficult. We want it to be a pick up and play, fun experience that anyone can play. You are going to find the Omega Elebits when you need them."
From Nolan's comments, it sounds like the adventure-style Elebits DS games are planned as a new, continuing branch of the franchise separate from the grabby Wii games. "Mukaitouge-san who is the producer of the first one basically said that the DS experience will be the next direction for the next DS experience. The first Wii game will be the story and the starting point for the next Wii game."
Which means that yes, there will probably be more Elebits games on both systems.