02/19/2013 07:15 PMPosted by VeloranThe whole, "Azeroth doesn't need guardians anymore" thing kind of falls apart when you take into account the threats facing the planet, and then look at our characters.
The role of the guardian was to secretly hunt down demons appearing on Azeroth as a result of the usage of magic by humans (of Dalaran, specifically), who were oblivious to both the demonic threat to Azeroth and the effects of using magic recklessly.
After the events of WC3:RoC, everybody knew about the demons, so it was no longer secret. Also, the accomplishment of the mortal races in defeating the legion proved that they were capable of handling it. For these reasons, the guardian was no longer needed.
The Burning Legion may still pose a threat to Azeroth, and there may be other powerful threats as well, but the mortal races can handle it; this was the resolution at the end of WC3 that Medivh was going on about.
Though that may no longer hold, or it may be tenuous, since the factions that comprised the "guardians of Azeroth" are now at war with one another. Even then, Wrathion's plan should fix that.