Right around the time he tackled All-New X-Men and Guardians of the Galaxy, everyone just kind of forgot that Brian Michael Bendis was a big deal. Forget when he went to DC! By then it was ancient history. It’s kind of the price he paid for driving so many big events so quickly. And the climax was basically Siege, a big event that finished out the stories that began with “Avengers Disassembled,” and basically undid all of them in the process. It was a big noisy reset button.
“Disassembled” itself gets lost in the shuffle since by the time of the movies everyone just started assuming that the only Avengers comics that mattered were The Ultimates (aside from the Sam L. Jacksoning of Nick Fury, the tone of the movies inarguably owes far more to Bendis than Mark Millar, the most shameless PR man in comics since Stan Lee). “Disassembled,” all the same, led to New Avengers, a Marvel all-stars version of the team that included Spider-Man and Wolverine in the mix. Bendis himself tore into House of M (which was basically the X-Men disassembled, but he himself didn’t return to the franchise until AvX and then All-New, which admittedly fizzled out on a gimmick of the time-traveling original team sticking around forever), and then the whole Civil War and “death of Captain America” thing, and then Secret Invasion (which the MCU teased and then widely dodged as the follow-up to Thanos), which gave us Norman Osborn (the Green Goblin) as the Iron Patriot and leader of the Dark Avengers…
So the status quo was massively upheaved, and Siege was its reckoning (funny; Dan Slott teased “The Reckoning War” for years, but by the time he actually got around to it literally no one cared, alas). And it turns out to be a very lightning quick affair. Osborn pulls the trigger on his evil plot to be evil, the Avengers reassemble, Asgard falls, the Sentry is used as a massive plot device (a whole character who only ever existed at Marvel for this purpose, kind of like Adam Warlock). Bing bang boom!
The lesson in all this was event fatigue for fans. They ultimately cared not at all for the storytelling (the mutant question led to actual real storytelling in the X-Men comics for a while, the existence of a potential savior in “Messiah Complex,” which AvX boiled right back down to the usual shenanigans, with “Cyclops” Scott Summers instead becoming a villainous pariah to no one’s benefit).
Now, put aside that you really need to know so much of any of this to comprehend the storytelling in Siege. Put aside the nonsensical assassination of Steve Rogers so quickly undone, so that Rogers and Bucky Barnes spend most of their time in these pages insisting, “You be Captain America! No, you be Captain America!” Forget that whatever nonsense has sidelined Tony Stark this time…happened (you would really hardly know Iron Man was literally the most famous superhero in the world at one point and the whole reason the MCU phenomenon happened with how little Marvel knows what to do with him even now, a medium that usually dumps ten thousand titles on a hot commodity when the going even seems good, and yet at no point did this happen with Iron Man; this is the guy who is apparently so disposable to his own company that he’s literally spent time as his own teenage self and even an AI incarnation of himself, and these are only blips in his publishing history; something called “The Armor Wars” and the fact that he was once a hopeless alcoholic remain his defining legacy)…
I digress. A little. So Bendis pulls the trigger, and that’s Siege. And that’s basically also why it matters. Marvel has such a penchant for telling its readers what to think (the entire characterization of Doctor Doom is everyone saying how impossibly dangerous he is), that when it just goes ahead and tells a story, with an actual ending, it’s baffling. But this is an ending. It’s what happens, what it looks like, when Marvel invests enough time and attention on itself to see something through, its own logic play out. Inevitably the good guys of course have to win. Bad things kept happening, and then those things stopped happening, because the good guys have to win. The end.
And if you tell a story like that, you unleash Bendis. The guy was born to have characters talk this sort of thing to death. Because he’s also wise enough to stop the chatter and just let the big things happen. So that’s how this plays out. Of course it is.
It wasn’t really his fault that Marvel didn’t have a lot of room to maneuver past it. But of course the events kept coming anyway, and eventually there was the one where Rogers was altered to be a Nazi, and that didn’t go over so well, and that’s never going to be in a movie (except as a reference fans can chuckle over in that great elevator fight in Winter Soldier).
So Siege is kind of a big deal.