I always like Black Empire themes on Warcraft. They based on lovecraft books but, blizzard lore devolopers convert it to better than the original one. I think, battle for azeroth 8.3 patch wasted the black empire theme and Old Gods Invasion scenario. There is so many potential for Old Gods and I believe we will see a whole expansion about it.
For the Logo, This is my personal background for patreon and artstation pages. All rights deserved to blizzard.