Mortal Engines is undoubtedly a flawed movie. The characters are perfunctory. The plot is predictable. The finale is Disneyesque.
But, despite all of that, Mortal Engines is a compelling movie, for a number of reasons.
Firstly, it is visually stunning, breathtaking to look at. Secondly, its political subtext makes it interesting. The premise that it is based upon gives it a poetic tragic doom-laden quality that allows it to transcend the limitations of plot and character.
Politically, this movie is not at all incoherent, as the critics would have it. The movie depicts a wasteland world, following the collapse of civilisation, in which predator cities on caterpillar tracks scour the landscape for the scarce resources to preserve their own existence and cultured way of life for their urban elites. The fact that this system of "municipal Darwinism" is unsustainable madness does not detract from the inner coherence of the premise one iota. After all, global industrial capitalism is also unsustainable madness, but here we are. The warrior cities are locked into a logic of Darwinian competition because that is the only way they can sustain themselves within the system, even though the system itself is doomed, since it produces nothing and it needs to consume everything that is left. The irony here was that the mobile warrior city of London required virtually all of its plunder from its depleted hunting grounds simply to feed its insatiable engines - movement for the sake of movement in place of capitalism's production for production's sake!
Nonetheless, the plot limitations do undermine the movie at the finish. The most obvious defect in this respect was the failure of the defenders of the Shield Wall protecting the fixed settlements of the East to dispatch London into oblivion before it had the chance to power-up its doomsday weapon. The opportunity was certainly there, with the defending fleet airborne, but then inexplicably failing to take action, hovering statically above their own city.
A second defect was the implausibly benign response of the defenders to London's survivors after the city was immobilised by the heroes of the piece. They had just witnessed the almost complete destruction of their own city in an unprovoked attack, after all. This attack was genocidal, and described by the city Elder as the "unleashing of hell on Earth". Yet here they were, these Easterners, offering smiles and hands of friendship to the bedraggled band of Little Englanders (the 23rd century equivalent of today's "hard Brexiters") emerging sheepishly from the wreck of Imperial London. OK, the point was to counterpose universal human values of solidarity to those of Western militarism and colonialism. But this was at the price of wild narrative idealism that just seemed foolish. Not even a judicial trial and restorative community-based justice seemed to be on the cards!
Nonetheless an epic movie!