Paragon Studios has your answer: Street Justice. It's a brand-new powerset just released in City of Heroes Freedom, available to Scrappers, Brutes, Stalkers, and Tankers. It looks like a flashier mashup of the Martial Arts and Super Strength sets, and according to a post by Paragon's Phil "Synapse" Zeleski, Street Justice is like many of the newer CoH sets in that it comes with a special mechanic, in this case, combo levels and finishing moves that give more freedom to the player than does the similar gameplay hook of Dual Blades.
Street Justice is available for purchase in the game's cash shop for 800 Paragon Points (about $10 US). It is one of two new powersets not granted freely to VIP subscribers. Check out the video after the break to peek before you buy.