Quasi-related, but Blizzard is showing a new WoW animated series and possibly revealing the release date of the next WoW expansion at Gamescom on Thursday, which means that they are going to have some stuff for the event. Not sure if this means anything for D2:R chances, but at least we know something is happening.
Here's the trailer:
Anyway, if I were to guess - if they are going to focus on WoW then I'd say they might not have any other big news, including D2:R, which means that if D2:R is even a thing, we'll probably have to wait for their virtual Blizzcon in warly 2021 to see it. That's going to be my bet
P.S. Double posting for visibility