VS DC Universe Previews: Boomerang
First appearing in Flash# 117 (1960), Captain Boomerang was one of the original Flash Rogues. He was camp. Whod’ever think of making a costume with boomerangs as a pattern? He probably made it from his mother’s curtains.
Later on in his career, Captain Boomerang would be forced into the Suicide Squad. One of the longer running members, he showed enough combat prowess and undercover skills to be a boon to the squad. He remained with the squad until it disbanded.
The end of the original Captain Boomerang came in the Identity Crisis miniseries. Owen Mercer found himself obsolete and wanted to put himself back on the map. He was contracted to kill Jack Drake, Tim Drake’s father. He was eventually shotdown in the showdown which ended up in a double takedown. (Hey, he was camp okay)
There’s been two version so far of Captain Boomerang in VS, both appearing during the JLA expansion and a decent two drop at that.

[...] http://carebuggers.wordpress.com/2008/08/01/vs-dc-universe-preview-boomerang [...]
Owen Mercer Captain Boomerang and Boomerang « DCU Previews said this on August 1, 2008 at 11:29 pm
[...] character with the version Rogue Leader, and the single Rogue we’ve seen already, over at Carebugger’s excellent blog, has the version Cold’s Rogues. One story that influenced the design of this set heavily [...]
Inertia, Rogue Leader « DCU Previews said this on August 3, 2008 at 4:33 am
[...] paying attention, you caught a brief glimpse of things to come when the Owen Mercer preview ran (http://carebuggers.wordpress.com/2008/08/01/vs-dc-universe-preview-boomerang/). That’s right, the Suicide Squad is finally coming to [...]
Amanda Waller, Rogue Queen and Raise the Flag « DCU Previews said this on August 7, 2008 at 10:25 pm