but but...the quest gives you 1s 75copper (7+5=12) which means the expansion will launch on December 1st 2014.
Furthermore, in the screenshot, Smith Argus is holding a WRENCH - a clear symbol that the next class will be Tinker and there's half a wooden barrel in the background which means the new race will be Ogres.
The quest requiring "Level 5" means there will be 5 more levels to cap in Argus-land.
Clearly, as we "have already been to Bartlett", he will be the main gryphon master in Argus-land.
As we are delivering armors per the quest text, there will also probably be a War effort before the final boss in Argus.
Also according to the text, gryphons are our friends, so there will be a boss in the new raid where Gryphons will help us, which means the Wildhammer Clan(the one that deals with the gryphons iirc) will be heavily involved in the lore.
Sounds great to me, can't wait for "Return to Argus".