Of the 9 Villains, 3 were in the original Rook City (Chairman, Spite, Plague Rat), 3 were in Enhanced Edition but in other products (Ambuscade, GloomWeaver, Kismet), and 3 were entirely new to DE (TerrorForm, Fey-Court, Carl).
2 of the Environments were from Rook City (Pike Industrial, Rook City), 2 were from other EE sets (Realm of Discord, Temple of Zhu Long), and 1 was new (Diamond Manor).
2 of the Heroes were from Rook City (Fixer, Expat), 3 were from other EE boxes (Setback, NightMist, Harpy), and 1 was new (Alpha).
Disparation could follow those trends.
Also, I’m just going to quote the list of Hero Variants that I theorized could be in Disparation awhile back in another thread:
I think it’s very unlikely for Disparation to have both an Aeternus Environment deck and an Aeternus Villain deck.