“The Dire Wolf Project was started in 1988 in order to bring back the look of the large prehistoric Dire Wolf in a domesticated dog breed. The National American Alsatian Breeder’s Club governs the project and standardizes breeding practices for this unique large companion dog.”
http://theamericanalsatian.tripod.com/direwolfproject/
You’ve always wanted an unpractically huge prehistoric dog to complement your Game of Thrones cosplay (or comically overkill your LARP opponents). Now, there is an organization whose goal is to help you make a mockery of nature realize your fantasy - since 1988!