First of, I'm really disappointed that you did not address WHY they have put the standalone on hold, and apparently the Henson company supports HIT's poor decision on not giving us a very simple release date on the standalone boxset. Also your comment about "..is not out of the question" tells me that they did expect us to buy the complete set, and not releasing the stand alone season 4, is that correct ?
You should have asked them why they think they can treat loyal customers like that and expect them to buy 3 seasons they already own, personally I don't believe it's worth to spend around $75 on something I already own just to get a poster....
If the purpose is to convince the loyal customers to use more money on something they already own, then it did not work on this loyal customer.
I will still recommend people to buy the Australian boxset of season 4 and download a dvd rip of the special features on the complete set, to punish HIT for it's poor decision. And reading the comments on Amazon confirms that others have the same thoughts.