Well it doesn't have to have all 4 instruments in the song, but every one of the 4 main instruments in the song (drums, guitar, bass, vocals) HAS to be charted on every difficultly.
A good example is YYZ by Rush
I just said that if it DOES have all four instruments, they will be authored. They certainly don't have to have all four, and can even have only 1. Solo acoustic guitar songs are fair game.
Order Status - Tranferred from regional warehouse to central carrier shipping hub
So, what songs/albums would you like to see first if this came true?
Personally, being realistic, I would want (first) Metropolis Pt. I, As I Am, and Six Degrees (split up of course).
In an alternate reality (without time limits), I would want In the Name of God, Octavarium, The Count of Tuscany, and A Change of Seasons.
That'd be great to see The Glass Prison make it into the game, but It's over 10 minutes so it probably won't happen
RBN has a 10 minute max on song though. So will they be alter that rule for the catalog? Or will they edit the songs which would ruin them like they did for Prequel To The Sequel by Between The Buried And Me.
Edit: And if they do do the entire catalog, I'm impressed that DT has all of their master files still.