LEGO DC Comics Super Heroes Constraction theme, also known as Ultrabuilds, are are constructable action figures based on a ball-and-socket building system that use TECHNIC parts. Three DC Constraction sets have been released to date based on Batman, The Joker, and strangely, Green Lantern and were some of the original theme's sets. The Constraction figures utilize different color schemes than their respective minifigures, and also have different weapons.
Constraction was introduced in 2012 and currently consists of 3 sets.
Summary
DC Comics Super Heroes Constraction The Joker set 4527 was released on December 15, 2011, retailing for $15, it has since been retired. New, unopened sets are valued at $29, while used sets sell around $11.
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