I've sleuthed it out.
Paizo is clearly flipping through their old TSR library for AP inspirations and having done homages to Al-Qadim (Legacy of Fire), Birthright (Kingmaker), Ravenloft (Carrion Crown), and Oriental Adventures (Jade Regent), their next AP is obvious:
Spelljammer!
Some may point out that Planescape or Maztica are viable options too, but I submit that neither of them benefit from this -clicky- coming out the same month as that next AP begins.
While you may be right, I think the one after Jade Regent is pirates.
You'll forgive me for not linking it, but the AP after Jade Regent is Skull & Shackles. The one after that is Shattered Star (maybe? its what I heard but I have no reference for it) which is supposed to be a loose sequel to the Runelords thing. Maybe it's a space thing, though.
While you may be right, I think the one after Jade Regent is pirates.
Calendar fail. The pirates starts in February when the Worlds Guide comes out. I guess that product doesn't support my theory after all.
I guess the next AP *could* be Dark Sun...