On-Topic: I don't really think there is another side of Azeroth, is there? I thought the map was laid flat, as most maps are today. It is possible we've missed something, but I would've thought the map was pretty much as seen, minus a continent here or there for expansions**, and some islands, but another whole side of the planet?
**On that note, I recall one of the older Zeppelin Flight Paths actually went over where Northrend was, before it was added. How did no-one see that!?