Of course they put them out in piece like this...they make more money this way. Most fans buy them piecemeal, and then in whole sets. And mostly, this release schedule is to catch parents in stores like Target and Best Buy, not for collectors. When little Johnny wants to put a cartoon in the cart, mom is much more likely to pay 10 bucks rather than 30. Once they feel they've tapped that market, THEN they put out the full set, sometimes on Bluray, so they can get YOUR money. These guys are marketing geniuses with JOBS for a reason. They know how to exploit you and I to make money.