Once again where the link? top of that tanaka is now working on FFXIyoshi-p said no so it wont happen. PVP world would be a pointless thing to add this game would never be as good as rift,wow, because wow players don't like JMMO i know because i play wow for a time and they all said the same thing they like how ffxiv look but don't like the feel to it.
So there no point in adding open pvp it too much work to only have 1k ppl on it.
PVP events like they had in FFXI i agree with maybe airship pvp fights and ship battleand many other stuff but no open world pvp or allowing ppl to dual.