Phantom Hourlglass will have kind of SM64DS sales.
Mario Party ds is obviously heading to the club.
Other games wich would take the same path are obviously:
-Dragon Quest 9 (only Japan sales will take it above 7-8 million
-and any next brain game or new mario bros sequel (not even counting a possible Smash Bros DS wich would also sell really good)
Wii60+DS owner
Long Time Nintendo loyalist