It’s been just over a month since a number of people went searching through the RockBand.com artist URL pages looking for future artist DLC. With the exception of EMF, all of the artists uncovered have arrived as Pro Guitar/Bass DLC, so don’t be surprised if Unbelievable appears in the Pro Guitar/Bass DLC announcement this Friday.

While this “hack” only works for artists that currently have no DLC, the latest round has uncovered only two gems so far (expect updates if more are found). While Heart has made a number of appearances in Guitar Hero titles, this find may signal the band’s first appearance in the Rock Band franchise. Here are the bands found thus far:

UPDATE: confirmed over on the @HMXHenry confirmed over on the RockBand.com forums that Heart is indeed coming, although it will only be a single, rather than a pack.

[Thanks to Benji & Plutarch for the heads up!]