Short answer - don't call it "Sacred" (3). Give the game some other name.
If Diablo 4 is suddenly released as a FPS in a WWII setting, I'm certain that won't go down well with the Diablo community, right?
A game with no open world, no limitless character development, no means of equipping multiple CAs, no huge amount of side quests,no immediately equip-able yellow shinies certainly does not match up to a game worthy of being labelled "Sacred".
EDIT: I remember waaaay back when Sacred 2 was announced. No hype about any other game came close for me. I spent hours just searching for every