I bought Earth X four years ago, but only this May did I manage to read it all the way through.
This says more about my eyes being bigger than my stomach, reading-wise, than about the quality of the work by Alex Ross, Jim Krueger, and John Paul Leon.
Still, the book is dense, both in concept and execution. Readers weaned on more pedestrian crossover events (oh, all the villains have escaped from Arkham ... again!) may be surprised by how ambitious Earth X is. Its goal is nothing less than a unified theory of the disparate events at the bedrock of the Marvel Universe, encompassing the Celestials, Inhumans, and Asgardians, along with Uatu the Watcher and Galactus thrown in for good measure. And those are just the cosmic players. The book is also chock-full of the typical suspects—Reed Richards, Tony Stark, Captain America, Spider-Man, the Thing, et al.
So, this is a book that swings for the fences. It doesn't quite get there, but it still offers much to recommend.
First, the world-building and continuity bridges are impressive. Krueger, as writer (sharing story credit with Alex Ross, who also designed the futuristic landscape and characters), has set himself a Miltonian task (to "justify the ways of God to men," as the poet announced in Paradise Lost) by teasing out "a purpose to the throng of accidental heroes that Stan [Lee] and Jack [Kirby] created so many years ago." Earth, it seems, is home to a gestating Celestial, protected through the years by mutations implanted in the indigenous inhabitants. Said mutations present themselves as superheroes, but only after traumatic events, such as World War II (for many of the Invaders) or radioactive spiders (for ... well, you know), germinate the deeply buried seeds.
Second, this may well be John Paul Leon's masterpiece. I haven't yet read The Winter Men, which some readers declare his finest work. Yet it's hard to imagine any other artist organically working so many heavy hitters into one story. The climactic battle between Galactus and the Celestials rivals any big-budget superhero film, and that's just one sequence among dozens that are equally jaw-dropping.
It was also gutsy of Krueger, Ross, and Leon to use Aaron Stack, aka Machine Man, aka Mister Machine, as the story's protagonist. Outside of hardcore fans in 1999 (when Earth X was first published), who even remembered this character from Kirby's short-lived 2001: A Space Odyssey series? But Stack makes the perfect vehicle to observe a Watcher's dissolution into madness. That the creative team also worked in an appearance by the Monolith, the hunk of extraterrestrial stone that gave humanity's ancestors the edge over their enemies in Kubrick's original film, is a bonus.
However, Earth X's biggest assets are also its biggest flaws. The ambitious plot is sometimes too convoluted. A teenaged Red Skull skulks about the periphery, a new Daredevil's origin remains fraught with mystery (if it was revealed, it flew over this reader's head), and a major plot point—all of humanity gaining superpowers—isn't explored in nearly the detail that it could (or should).
A series that relies so much on the audience's previous knowledge of the Marvel Universe doesn't need origin recaps for the major players, but the book overflows with them. Worse, these summaries of Spider-Man, the X-Men, and the Fantastic Four don't provide any new analyses or breakthrough observations.
And the ongoing battle of wits between Stack and Uatu becomes tiresome, especially when extended to text pieces at the end of each chapter. These could uncharitably be described as filler, something to fill the empty spaces around Ross's concept sketches. A better use of the pages comes in the appendix to Chapter Twelve, when Captain America offers an insightful analysis of his relationship with the Red Skull and with America itself. More insights like this would allow the words to compete with Ross's sublime designs.
In the end, Earth X is a book that commands attention. It transcends the tired rationales for most large-scale events and delivers a carefully considered vision of the Marvel Universe's past and future, along with some slices of philosophy suitable for our own time. Despite flaws in pacing and an overabundance of underutilized characters, it's a book that deserves to be revisited.
Even if it takes some readers four years to do it.