Hey,
the german Video Games Site Gamestar noticed something interesting.
The official description in an advertisement in their printed magazine (Gamestar is a print media) of the „Art of Diablo“ book which will be released on November 3rd (right after BlizzCon) has the sentence
"Mit über 500 Artworks aus Diablo, Diablo II, Diablo III und Diablo IV präsentiert dieses Buch zahlreiche bemerkenswerte Kunstwerke, die für das ikonische Action-Rollenspiel von Blizzard Entertainment kreiert wurden, das Generationen von Fans ewig währende Albträume beschert hat. "
in it. (Please translate for yourself in google )
As you can see, Diablo IV was listed with Diablo II and Diablo III. So it could not have been a typo.
Source (German): https://www.gamestar.de/artikel/diab...t,3350309.html
What do you think?
Edit: It is in an advertisement which is printed in Gamestar‘s printed magazine!
Edit2: I will head to a Kiosk for you and try to take a picture of the advertisement, give me 1 hour
Edit3: here you go: