http://ca.ign.com/articles/2013/11/1...aft-expansionsSpeaking to Digital Spy, lead systems designer Greg "Ghostcrawler" Street acknowledged that expansions always saw a boost in subscriber numbers, so the team were interested in bringing them out quicker.
"We really want to get to a cadence where we can release expansions more quickly. Once a year I think would be a good rate. I think the best thing we can do for new players is to keep coming out with regular content updates."
An expansion a year? I can dig it.