I have a hard time believing that just because BG&E sold better on the gamecube when it came out theres some magical guarantee all wii owners will jump on the sequel, especially considering the wii caters to a whole new audience than the gamecube did imo.
Yes, they both try to cater to "nintendo fans" but lets face it, the wii caters to the whole "casual crowd" now too, and I doubt casual gamers are going to be all over a hardcore adventure title like BG&E-- just honest truth there.
With that out of the way, this is exciting really no matter what console it's on. Pretty much agreed it's not likely to sell well (no matter what console, really) but if something like blue dragon or eternal sonata can break 100k I'm sure this can too, and hopefully that'll be enough to consider it something above "horrifying failure" at the very least.
Jam it back in, in the dark.