Given how Soken seems to be reserving 1.0 tracks for secondary use (such as optional hard mode dungeons, or cutscenes), it's more likely new zone themes will have new tracks and missing 1.0 tracks like Widdershins will continue to be added in other parts of the game, to say nothing of appearing also on the Orchestrion. Personally I'm waiting eagerly the return of the original 1.0 city themes like Navigator's Glory and Born of the Boughs, and the beautiful cutscene track Piece of Mind. There is still plenty of 1.0 music to come which I'm sure Soken will find suitable places in ARR for.