After much speculation and rumor, Funi (through a contact at ANN) has confirmed that their release of the DragonBoxes, the latest full iteration of DBZ, was a 'limited edition' release only. This means that the current 4 boxed sets won't be repressed, and no further boxes are likely to be released. At least that's what I think.
The reality is that regardless of whether Funi originally intended these to be 'limited' or not, the Dragonboxes have just not sold well, and what I think Funi is probably doing is discontinuing the release in favor of a new version in BD format next year. We have put the current DragonBoxes on 'stock on hand' status, but will continue to keep the older (but complete) orange box version in stock as long as we can.