Nintendo has revealed that Four Swords, Tetra's Trackers and the new Shadow Battle will be available as one GameCube game. There's new details on the gameplay, too. Each mode now has single-player versions!
Four Swords is renamed to Hyrule Adventure. The GBA can still be used to display the action, but players without GBAs can join in on on-screen windows, too. It has a storyline too, for single-player adventuring.
Tetra's Trackers is now called Navi's Trackers, and it includes a speech generator that can say players' names and give (helpful?) advice.
Shadow Battle pits players against each other in battle. Not many details are known yet.
Japan is getting it in February, so watch out.