Quoted from WaddleJrJr:Difference with this is the digital reproduction of their music. Slapping their name on something is one thing, but letting a company release a product that has files containing the songs themselves, may be a little harder to get the licensors to agree to.
Good point. ACDC was one of the last big bands to release their music on iTunes so they could very well have some issues with a digital release of the table.