Originally Posted by
Teriz
I'll keep this brief since this is merely theory, and I could be completely wrong about this.
Essentially I believe that Mechagon, like the Timeless Isle before it, is a rather large hint at the nature of the next expansion. If you remember, in the Timeless Isle was released at the same time as The Siege of Orgrimmar, and we first encountered Kairoz who sent us on a quest to find an artifact that would allow him to peer into alternate timelines, and he would eventually rescue Garrosh and send him back in time to an alternate Draenor and that led to the Warlords of Draenor expansion after Mists of Pandaria. The Isle itself was largely based around time travel, alternate timelines, etc. In short, the Timeless Isle and SoO were intrinsically connected, and eventually led to WoW 6.0.
Many have compared Mechagon to the Timeless Isle, however unlike the Timeless Isle, many think that Mechagon is a one and done deal with no connection to the overall story taking place with Sylvanas, N'Zoth, and Azshara. However, if we look a little bit below the surface, we see a connective tissue between the two; King Mechagon is attempting to use technology to purge what he views as "Old God corruption", i.e. The Curse of the Flesh.
I know some think that that is silly, but consider if this were flipped around, and you had a hero, say Mekkatorque, attempting to use a device to rid Old God corruption from a city or a group of people. Not only would you say that this is obviously connected to the overarching theme of the story, but obviously this is going to be used against the Old Gods at some point, either in 8.3 or 9.0. Blizzard flipping this around so that we're essentially stopping the villain from purging an Old God curse hides the general thematics at play, and one of the true purposes behind Mechagon's existence (the other is getting the player base more familiar with technology and gadgets in WoW).
Which finally leads to Mekkatorque and the Junker Gnomes. I believe that in 8.3, or maybe even 9.0, Mekkatorque returns, the Junkers join as a playable race, and Mekkatorque develops technology from Mechagon that can effectively fight the Old Gods. Perhaps this is a repurposed or redesigned Mechanoriginator, or it is something else entirely, either way, I believe that Mekkatorque becomes a key figure in defeating the Old Gods.
That's my theory. Feel free to discuss away!