Dungeons & Dragons has been publishing rules for other settings going way back, with Conan adventures in 1984 and Lankhmar – City of Adventure in 1985. Even further back in 1980, the first printing of Deities & Demigods included stats for gods from Michael Moorcock's Elric stories and H. P. Lovecraft's Cthulhu mythos. It's even collaborated with Blizzard on a line of Diablo supplements to tie in with the release of Diablo 2.
So it's not too shocking that the first official Dungeons & Dragons crossover book released as part of its Universes Beyond line (borrowing the name from Magic: The Gathering, where crossovers have been big earners) will be about World of Warcraft. Especially since the news already leaked over the weekend.
