I've read a few conspiracy theories about Lucas's plans with this release, none of which I believe. Here's mine, which I think is plausible: LFL have been planning the OUT release since last year. The three disc set was originally going to be it, which is why it had the original poster art on it (and no bonus disc, as it would be supposed to be a companion to the '04 set). Then George said "hang on, that way they can get the OUT without my improved '04 editions - what if it outsells them?" So they postponed the OUT release and just put out the '04 discs again. Now they package them together, so it can be spun either way, regardless of sales.
I've read a few conspiracy theories about Lucas's plans with this release, none of which I believe. Here's mine, which I think is plausible: LFL have been planning the OUT release since last year. The three disc set was originally going to be it, which is why it had the original poster art on it (and no bonus disc, as it would be supposed to be a companion to the '04 set). Then George said "hang on, that way they can get the OUT without my improved '04 editions - what if it outsells them?" So they postponed the OUT release and just put out the '04 discs again. Now they package them together, so it can be spun either way, regardless of sales.