Approximately how long do we have to prepare before the next content patch?

[Lazus]

If XI is any clue, major patches tend to take months and full expansions a year or two depending on how much content they add. Adoulin took years but then it did add a whole new continent with content that's not even fully deployed yet.

Just to say, but Adoulin hasn't even been out a year yet, heck it barely been out 6 months.