File:WoWWiki.svg

Summary
From File:Logo-horiz-260px.png:

By Mikk. Placed in the Public Domain.

The W design is arguably very inspired by the "W" in "Warcraft", but it's not a straight copy (and I've got the .svg to prove it :-)), and the other characters do not even exist in the WoW logo, so to the best of my knowledge, this is original work.