The graphs look kind of funny compared to each other :P (http://vgchartz.com/swlaunch.php?reg1=Japan&game1=Dragon+Quest+VII+-+PS®2=Japan&game2=Wii+Sports+-+Wii®3=Japan&game3=Wii+Fit+-+Wii&weeks=100)
If you compare Wii Sports/Fit to rain Training, which is 200K behind DQ7, you can see that Wii Sports is starting to lag behind.
Wii Sports is down to 10K/week. That would make about 250K for the rest of the year, excluding holiday. It should see a boost then, selling perhaps 150K during the season, making it only need 600K more from 1.1/2009 to beat DQ7.
Wii Fit could average 30K/week through this year, including holidays, bringing it up to close to 3M, leaving it 1.1M behind.
I'd say both should make it.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS