Thread:Wraiyf/@comment-25003944-20140908030733/@comment-3250527-20140908031538

"Future plotlines".

Technically, this applies to whatever the anime has not gotten to. The only Progressive arc related content that the anime touched on was Aria of the Starless Night,

But who knows, maybe the anime will start a SAO Progressive arc.

Long story short, is used for anything not covered in the anime, regardless of the warning's description.