Joeron on 16 February 2008
DQ IX on DS will do better than DQ VIII. FF VIII will stay unbeaten this gen. DQ IX might come close though.
Also if NSMB 2 will release someday, then it will probably be the 1st non-RPG game to sell over a million in 1 week and enter the top 10. The next Smash Bros will do the same.