Wii wont score as high. Sales, I'm still unsure. I'm leaning towards DS but I keep thinking about how well Mario Kart Wii has sold.
NSMB was the first 2D Mario in a long time. NSMB is one copy per player, NSMB Wii is one copy for upto 4 players. However, this is Super Mario Bros we're talking about and I think the multiplayer aspect will be what makes it huge. Holiday season '09, lots of parties, Wii get's switched on, NSMB get's played, everyone buys it. I think word of mouth will make this a big hit.
Mario Kart Wii is 10M ahead of MK DS from launch. I never thought MK Wii would have done so well, so I'm going to go with NSMB Wii. I like to think it could do MKWii numbers but I think it will be lower.
I predict 12M first year putting it ~2.5M higher than NSMB DS from launch.
Nov 2016 - NES outsells PS1 (JP)
Don't Play Stationary 4 ever. Switch!
