There's definitely no shortage of new ball rolling games for the Wii. You've got Kororinpa 2 and Vertigo as the top contenders as well as Incredible Maze. In case that wasn't enough, DK Games has announced their "mesmerizing and gripping, gyrating ball puzzle solving and manipulation game" called Equilibrio.
Now I can get both Kororinpa and Vertigo. They have interesting environments and game features as well as some depth to the game play while Incredible Maze is just a bit of a diversion until you can get your hands on the first two. Response to Incredible Maze has been pretty mixed so it will be interesting to see if Equilibrio can fare any better. The game does include support for the Wii Balance Board however according to the developer "The Wii Remote is the ultimate controller to play Equilibrio...But the game has also been adapted FOR the Wii Balance Board. When using the Balance Board, players will get to play 'alternative' and simpler levels so that it is possible to finish the game."
You can find out more about Equilibrio by visiting the official website and you can also read an interview with the developer on videogamer.com.