Of the predictions made in the Hero Classes rumor, some did find their way into The Burning Crusade. For example, Druids can now summon Treants, and they do have a Crow Form. And mages can summon Water Elementals. In fact, the WoWWiki entry itself remarks:
It may be interesting to note that Summon Water Elemental is now a 41 point Frost Mage talent, released with The Burning Crusade expansion. Considering this article was created prior to the public release of information about Burning Crusade content, this particular part of the rumor leads one to believe there may have been some accuracy behind it.
With whatever accuracy may lie in the Hero Class rumor, let's have a look at this entry for Dwarven hunters:
The Mountaineer is similar to the ranger (no pet, energy bar), but without the stealth aspects. The Mountaineer is hardier in melee combat than the hunter and also has more extensive tracking and detection abilities.
lol wut? Melee, you say? An energy bar, à la rogues -- implying a Mountaineer is meant to melee? In that sense, Gweryc is potentially a forebearer of Mountaineers-to-come rather than a mere modern-day sideshow attraction. Is there some future World of Warcraft where melee hunters are desirable?