"Will we need a graphical update from the ground up at some point? Yep, probably," said Brack to Eurogamer.
"That's actually something we talk about every expansion. I'm positive we'll talk about it next expansion."
The WoW game client has seen minor graphical changes in updates and expansions, but no major additions to the renderer have been implemented since the game's release in 2004.
Brack also noted that MMO developers which have done graphical updates in the past have not necessarily benefited from the effort.
"A lot of people continued to play with the original client, because it was faster, or they preferred it, or were just used to it or whatever," he continued. "And so for me as a game developer, the idea that we would spend so much time and energy on something and have people go, 'meh, that's not really for me,' that's not very exciting."