i don't care if they include a code or if they will be exported from the disk but PLEASE include an option to select what songs to export.
Check your moral compass. It knows.
This question seems premature because we don't really know the logistics of how it will export. Having said that...
If you need to ask, you already know the answer. And it's yes.
I highly doubt that finding a new copy of Lego Rock Band will be even remotely difficult anywhere in the near future. If and when it does happen YEARS down the line, maybe Harmonix will change the import method.
I figure I may as well buy it even though I mainly just want it to export. I have the feeling it'll be an easy 1000 GS and it might be fun to try to make my main RB band in Lego form.
I went ahead and pre-ordered my copy.