Hi there link2hyrule, and welcome to the forum. Hope you stick around and enjoy our forum. ^_^
Now, in answer to your question - yes, the Blurays are indeed cancelled, and show no sign of resuming any time soon. They may in the future, or there may be a new approach taken to the series on Bluray, but it'll most likely be a while before that happens. So you can either wait till that happens, or go for the Dragon Boxes like you mentioned, just depends on how soon you just have to have the show.
Oh, and also, there's the Season Sets which are a cheaper option for sure...but the Dragon Boxes are the higher quality product, so if you don't mind spending the extra cash, those are the way to go, yes.