They are probably going to start work on the Druid after the next class , the class they are working on atm is 50-60% complete then they let slip in a interview that they might start on the Druid after that is finished . Read the end part of this interview.
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http://www.polygon.com/2013/10/28/5028776/neverwinters-next-expansion-adds-hunter-class-paragon-paths-and-more
The funny thing is that Makos has been featured in the game since the start because he was in the game trailer.
Well I think most companies whiteboard out their development a year or so in advance so it wouldn't be that surprising.