For most series over 12 or so episodes, Madman Entertainment release them over two or more collections, helping to space out the series over several months and I assume also saving consumers for one big initial price hit for a new release. Regardless of the reasons a couple of years after the collection releases, Madman Entertainment usually like to do a Complete Collection release which releases the entire series for a cheaper price. Some recent examples of this include K-ON! Season 1, My Bride is a Mermaid and Honey and Clover.
While no formalized date has been made yet (Although assumingly December 2012 – Early 2013), Birdy the Mighty: Decode will be the next series to receive such a release by the company.
Tsutomu Senkawa is an average high school kid who is busy studying for his senior entrance exams. Tsutomu goes out for some fresh air, after a hard day’s work studying for a big test, when he runs into a guy fleeing from a pretty young lady. The pursued man is actually an interplanetary criminal on the run from a Federation agent called Birdy Cephon Altera. Caught in the midst of this chase, Tsutomu gets thrown by the man at Birdy, which kills Tsutomu. Fortunately for Tsutomu, there is a way to keep him alive, although it comes at the price of discarding his body. He ends up merged into Birdy’s body.