The recently announced Future State event that will explore the future of the DC universe will introduce Jon Kent as the new Superman of Metropolis who decides the best way to protect his city is to bottle it, much like recurring villain Brainiac has tried to do time and time again while the city was under the watch of the original Superman, Kal-El/Clark Kent.
However, given all of the catastrophic events that the city of Metropolis has experienced since Superman moved to town, maybe Jon's new mission to protect the city isn't the worst idea, though Metropolis has proven its continued ability to survive the most destructive of battles. Of course, it doesn't hurt to have the deep pockets of Lex Luthor around to help rebuild, either.
10 Bottled By Brainiac
When Brainiac debuted in the pages of 1958's Action Comics #242, he revealed the existence of Kandor's bottled city, the miniaturized remains of Superman's home planet Krypton that was taken years before it's destruction.
As a universal collector, Brainiac had plans to miniaturize and bottle Metropolis for his collection, which he attempted and succeeded in doing a few times over the years. Thankfully Superman was always there to save the day, and Metropolis rarely suffered any lasting damage from the miniaturization.
9 Drowned City
Shortly before Lex Luthor's short-lived presidency of the United States, he was forcibly taken by Aquaman to answer for crimes committed against Atlantis. Since he knew Superman would follow, Aquaman sent Tempest to Metropolis as a warning.
Tempest threatened Superman with a tidal wave of water magically held in place, though when Superman knocked Tempest unconscious, the ocean began to pour into Metropolis. Only the pre-installed emergency turbine drains, and other heroes' superpowered assistance saved the city from flooding and giant undersea monsters.
8 Superman: Y2K
A new version of Brainiac from the future attempted to spread his technology throughout the planet during the Superman: Y2K storyline, which saw the highly-evolved Brainiac 13 (who had created its body out of Lex Tower) turn the citizens of Metropolis and other robotic heroes into his slaves.
While Superman was eventually able to stop Brainiac and restore the world to normal, Luthor had made a deal that left Metropolis completely transformed into the highly-advanced "City of Tomorrow," though thankfully, humanity was freed from Brainiac's control.
7 Convergence
The New 52's final Convergence event saw several cities from across the former multiverse and timeline plucked out of their places in reality by a Brainiac that had been transformed and corrupted by his travels across the multiverse.
A couple of Metropolis versions were collected within domed cities for the event as it explored many previously established universes and continuities. These domed cities were intended to compete for their survival, though they were saved by the multiverse recreation and returned.
6 All-Star Superman
Alan Moore and Frank Quitely's All-Star Superman told a possible final Superman story that explored his final days after being overdosed and poisoned with solar radiation by Lex Luthor, which inspired him to begin checking off items on his bucket list essentially.
One of these items included giving Lois Lane superpowers for a day. However, when Lex Luthor created his own version of the superpowered serum, he used his 24 hours to take on Superman and prove his superiority in a battle that could have devastated Metropolis if Luthor's powers hadn't burnt out.
5 The Fall of Metropolis
Lex Luthor II appeared shortly after his father's death, though it was soon revealed that they were the same and that he had managed to avoid death by creating a new cloned body for himself.
However, when that body began to suffer from a degenerative clone plague, Luthor (and his mad assistant) unleashed a final attack that nearly devastated Metropolis and left landmarks like the Daily Planet and Lexcorp Tower in ruins. Then a fleet of killer robots began to attack the city when it was down as part of a Luthor failsafe, yet Metropolis still managed to survive barely.
4 Battle of Shuster Park
One of the more recent battles that should have left Metropolis completely devastated was actually told in flashback beginning in Action Comics #1019, as the Legion of Doom teamed up with Leviathan to take on Superman with a bold new plan.
They knew that Superman would be hesitant to unleash his full power if they based their attack in his beloved city of Metropolis, and they picked Shuster Park for their battleground. The park itself was leveled, and it might have been much worse for Metropolis if Leviathan hadn't turned on Luthor and his Legion of Doom.
3 Battle of Metropolis
2006's Infinite Crisis featured quite a few different world-ending villains like the OMAC's and Alexander Luthor threaten the heroes of the DC Universe. However, the huge grouping known as the Secret Society of Super-Villains almost took out Superman's city.
The Society was put together by Deathstroke (through Alexander Luthor's manipulations) and featured some of DC's heaviest hitters as they waged war against the heroes in the heart of Metropolis. The city was heavily damaged, though it was the nearby Blüdhaven that ended up being destroyed by Chemo.
2 Reign of the Doomsdays
Doomsday's clones known as Doomslayer launched a plan to end the Doomsday clones' threat by using Doomsday clones to destroy anyone who made Doomsday Clones during the "Reign of the Doomsdays" crossover storyline.
While his initial plan didn't make much sense, his back-up almost worked too well, as he attempted to crash a giant satellite into Earth, which would have created a global extinction event. Superman and his allies were able to slow the satellite down enough to only produce a giant (and stoppable) tsunami outside of Metropolis when it landed in the city's bay.
1 Death of Superman
One of the biggest comic events of the 90s was the "Death of Superman" storyline that captivated readers and featured the powerfully destructive confrontation between Superman and Doomsday, who had torn his way through the Justice League on his way to Metropolis.
When Superman was forced to engage Doomsday in Metropolis, their blows' strength was enough to send devastating shockwaves through the city. If the two hadn't managed to kill each other simultaneously with a final blow, Metropolis would have been left in ruins by their continued battle.