In what can only be called an "I called it" or a "well, duh" moment, Harmonix reps have confirmed on their message boards that Rock Band 2 will be appearing on tonight's episode of The Colbert Report.
This move closes the circle that started with the original game appearing on the show in some backstage segments, and moved on to a song from Colbert appearing as a free download last week.
Check your local listings, y'all.