Well the reason I asked is because, digital premium is literally just the game + SP, soo... technically speaking it should be available to people who own tbe seasonpass like me.
There really is no logic regarding the (preorder) bonuses. Do you remember this chart?
If the PS4 theme is not mentioned in the season pass than it is not in the season pass. The catch is the digital preorder here I think. That's why they give you the theme as a bonus.
The season pass contains:
FFXV Holiday Pack
FFXV Booster Pack
FFXV Episode Gladiolus
FFXV Episode Ignis
FFXV Episode Prompto
FFXV Online Expansion Pack: Companion