User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-1153722-20130311074523/@comment-4636255-20130312012426

"A secret place for world dominion". They did so in ACR chasing after the Grand Temple. They did so in AC3 looking for the "precursor site" which turned out to be the Grand Temple.

It won't surprise me if this turns out to be another search for the Temple. But if they do search for it, it would be rather anti-climactic, as we all know that Connor was the first to open the Temple, implying that neither the Assassins or Templars will find it.