In terms of continuity significance, I don’t know if that arc had a real impact, outside of bringing Cap and Diamondback closer together. Worked well as a trade, though. It was a serialized arc, published during Marvel’s experiment with biweekly summer books. Only their top-selling titles were selected. Interesting CAP was one, given it was close to cancellation when Gru began. G. I. JOE was also represented, bringing readers the famous Cobra Civil War. The ASM biweekly books sold well, but led to McFarlane quitting the book.