Who Avenges the Avengers? The Avenging Avengers! That's who! After the great "Bendis Catastrophe" that wiped out most of the Marvel Universe, these are the only avengers left to figure out what happened, who orchestrated it and avenge their fallen comrades! They're a group of misfit heroes consisting of Winter Soldier, Luke Cage, Yellow Jacket, Spider-Woman, and Moon Knight who are all either former villains or unstable, and the only thing keeping them together is the idea of the team itself.
Bucky, back in his Winter soldier uniform, can't bare to put the captain america costume on again, although he embedded a broken piece of cap's shield into his bionic arm. He leads the team of misfits but he's very secretive and struggles being a leader. I wanted his arm to be more haphazard rather than shiny and new, also possibly have some secret gun/blade transformations. It's a robot arm after all. Having Winter Soldier instead of Cap demonstrates the state of the world at this point.