Not GAAS/subscription, but after sale dlc song support to the max. We don't need a GH Aerosmith and a GH Metallica, they can be individual songs or albums/themed song packs, but they all go into one GH hub-game.I honestly wouldn't expect or want new Guitar hero or Rockband nowadays. Since devs are starting to gradually step into live service games instead of just stand alone I don't even want to imagine how much they would charge for songs now.
Most old guitar accessories of the time are fucked, and the old games arent on the BC service. Modernise, one game, pump full of dlc content forevermore.