well there would be possible that nintendo games would get DLC, but knowing nintendo i doubt any of past and future wii games will ever get DLC.
multiplayer map packs for Conduit, CoD: World at War and other online fps/tps games,
additional quests/monsters/weapons for jrpgs,
additional levels for platformers and puzzle games(boom blox2, korrorinpa, me and my blob),
more songs for music games,
additional tracks and cars for racing games,
updates to sports games(updating team members for PES, NFL games) and fitness games(new exercises for EA Active)
those things are easily possible on wii since they wouldn't take much space. as long as it won't end up in "oh we finished the game so now lets cut 20% of it and sell it as DLC for 1/2 price of the game"(like with new Prince of Persia and Tomb Raider).







