Avengers Assemble #6

Two of Marvel's biggest teams collide in spectacular fashion on this 2012 cover, with the Avengers — Captain America, Iron Man, Thor, Hulk, Black Widow, and Hawkeye — surging alongside the Guardians of the Galaxy, including Drax, Gamora, Rocket Raccoon, and a star-spanning cast of cosmic heavy-hitters. Front and center, a blond hero in a blue-and-yellow suit charges forward clutching a glowing orb, with an alien combatant tangled in the action just below, all rendered in Mark Bagley and Danny Miki's energetic linework against a deep space backdrop. The "Guardians of the Galaxy Go!" banner sets the tone perfectly — this crossover event clearly has no shortage of firepower on either side.