3 essential Marvel Comics to read before Avengers: Doomsday

With Avengers: Doomsdaynot far around the corner, fans are speculating as to what exactly the story will entail. What we know so far is that, with Doctor Doom moving to a position of greater power, the Marvel Cinematic Universe is facing a threat the likes of which it’s never known. Sure, The Avengers have survived cataclysmic events before, but Doom is a lot smarter than villains like Ultron and Thanos, and thus poses an even greater danger to the heroes he despises.