Maybe if the Diablo and Overwatch animated series pan out, they’ll look at WoW.
That bein’ said if i were gonna do a WoW series it would be thirteen 1-hour episodes set in the current version of Azeroth, each one playing out in a different locale with different characters to give each race/faction their own perspective. The episodes would have their own self-contained plots but would also carry threads of a larger story that would ultimately culminate in the season-ender, disparate elements from various episodes coming together to tie the full season together. Animated or live-action is hard to say, though I think WoW’s art style has always favored animation.
I would make it an animated series that would follow a group of Alliance and a group of Horde characters. They would sometimes be antagonists for each other and other times save each other. Each season would follow a theme of an expansion.