Blitz is not "The Next" Rock Band, it is a side road, a pit stop of fun as it were, so I would not jump to any conclusions about potential exportability until if, and hopefully when, a new full band title gets released/announced.
Its not like Blitz is hurting for a larger song library. :P
What if Blitz is the Coup de grāce?
"Fortunately the forums ping my cell phone when there is an opportunity to discuss Witts junk."-DocSocaelicus