Upcoming book The Art of Diablo looks to cover the entire series, as per this Amazon listing, but a German advert of the book (via GameStar) went so far as to state that it features over 500 pieces of art from Diablo, Diablo II, Diablo III and Diablo IV - seemingly confirming that we'll be getting a full reveal for the as-yet confirmed sequel at BlizzCon in a couple of weeks time.

As per above, the book has a release date coinciding with the final day of BlizzCon.

At this point the existence of Diablo 4 is a given, with Blizzard famously noting last year that it has multiple Diablo projects in the works after the backlash the studio received from the reveal of the mobile-only Diablo Immortal.

Several rumours have been circulating recently stating that in addition to Diablo IV, Blizzard will unveil a planned Diablo II remaster in addition to Overwatch 2. Hinting at a BlizzCon that will see a number of big announcements. These rumours come from Twitch streamer Metro who accurately predicted Overwatch hero Ashe ahead of last year's show. His Overwatch 2 info includes word that the game will feature both PvE and PvP and a new leveling system for heroes.