When i was playin around on my mage i looked at the map and saw that there was a place south of Silverpine Forest and decided to check it out. When i ran down there i found The Wall of Greymane (hence were blizzard got the realm name Greymane from). So i suspected that when WotLK is released theyd open that gate and thats how we'd travel to Northrend but yet its just a guess, heres a picutre of it on my map.
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