Oh, it will sell.
They could make more profit if they shipped it in a smaller package, that is all.
That's true, but by the same token, I'm sure they don't mind the extra visibility at retail that the enormous packaging provides, especially with the competition they'll have this Christmas, in the form of Rock Band.
And speaking of Rock Band, ten new tracks were revealed recently
So here's Rock Band's confirmed track-listing so far:
"Gimme Shelter" by The Rolling Stones
"Won't Get Fooled Again" by The Who
"Mississippi Queen" by Mountain (non-original recording)
"Suffragette City" by David Bowie
"Paranoid" by Black Sabbath (non-original recording)
"Don't Fear the Reaper" by Blue Φyster Cult
"Blitzkrieg Bop" by The Ramones
"Highway Star" by Deep Purple
"Tom Sawyer" by Rush (non-original recording)
"Wanted Dead or Alive" by Bon Jovi
"Should I Stay or Should I Go" by The Clash
"Epic" by Faith No More
"Learn to Fly" by Foo Fighters
"Enter Sandman" by Metallica
"In Bloom" by Nirvana
"Vasoline" by Stone Temple Pilots
"Say It Ain't So" by Weezer
"Cherub Rock" by Smashing Pumpkins
"Creep" by Radiohead
"Sabotage" by Beastie Boys
"Main Offender" by The Hives
"Go With the Flow" by Queens of the Stone Age
"Reptilia" by The Strokes
"Are You Gonna Be My Girl" by Jet
"Here It Goes Again" by OK Go
"The Hand That Feeds" by Nine Inch Nails
There's a little bit of overlappage there with GH3: Cherub Rock, Mississippi Queen, Sabotage, and Paranoid.