Last time Blizzard went ahead to trademark something WOW-related, it was "Cataclysm", time to speculate about the new expansion (which hasn't been anounced yet

)
My guess: Same as the start of Cataclysm, people rushing to get world firsts paying 1 to 10K for a stack of ore / herbs / leather / (insert other gatherables)
The big money will be release day, so get those gatherers up to 85 and equip them with "good" gear (it'll be worthless when the Xpac hits as 83 greens will become better then current 85 epics)
I for one will not be queueing in a store anymore, I'll take the digital download from Blizzard store (saves me over an hour of wasting my life)
EDIT: Stickied for general speculation purposes