6-7 Mio.
I dont think it will go any lower, but maybe a little bit higher.
I really wonder how much the 3DS Version will sell though.

4-5 million

I would say 4 million as a minimum. Probably higher than that. As much bigger as the 3DS "install base" is, and as inevitable as the 3DS version of Smash will indeed sell well, let's not kid ourselves: the only version of Smash most people REALLY care about, is the main version, the Wii U version.

Somewhere around Melee sales, 6-7 million.

About $59.99 the first year. Then marked down to around $39.99

Depends on if Nintendo stops being stupid and drops the price to a reasonable price this Holiday like $250 with a game or a new scu with 500gb hd with game for $299. If they don't 4 million if they do 7 million. 3ds will sell 10 million easy.

Considering the amount of hype it has generated after E3, I optimistically think it'll reach 8 digits at least.

4 - 6 million, no more, and no less than that range. It's likely not to reach too high in the short term since Mario Kart, a more popular series, probably won't reach too high either. It all depends on how large the install base grows. Don't let Brawls figures fool you, we're talking about a game releasing on a console that is a mere fraction of its predecessor in sales, no way is it approaching 12 million, it will struggle to even reach half of that, if it ever does.

Just depends on how well it sells during the holiday season. I can say on the low end 7M on the high end 12M

6-7 million