Order Reborn

""For over a thousand generations, the Jedi Knights were the guardians of peace and justice in the Old Republic. Before the dark times... before The Empire. ... Now the Jedi are all but extinct.""

- Obi-Wan Kenobi, Star Wars Episode IV: A New Hope

""Not the last of the old Jedi, Luke. The first of the new.""

- Obi-Wan Kenobi, Heir To The Empire

Long ago, there existed an order of people who battled evil valiantly but have since fallen into disarray and were ultimately forgotten. But as the ancient evil rises its head again, a new group of heroes will take up the fallen banner of their ancestors and defend the world that they passed down to them in their name.

The Order Reborn is a reincarnation of an extinct heroic organization that has been forgotten over time but resurrected by the distant successors to combat evil, new or old. It is probably based on the old principles but (ideally) with adjustments made to prevent it from meeting the same end.

Usually precipitated by the Last of His Kind, who will become The Obi-Wan. The "order" being rebuilt is often The Chosen Many. A subtrope of The Order.

Anime and Manga

 * Record of Lodoss War had at least one of these.
 * "From days of long ago, from uncharted regions of the universe, comes a legend. The legend of Voltron: Defender of the Universe. A mighty robot, loved by good, feared by evil. As Voltron's legend grew, peace settled across the galaxy. On Planet Earth, a Galaxy Alliance was formed. Together with the good planets of the Solar System, they maintained peace throughout the universe until a new horrible menace threatened the galaxy. Voltron was needed once more. This is the story of the superforce of space explorers, specially trained and sent by the Alliance to bring back Voltron: Defender of the Universe."

Comic Books

 * The Green Lantern Corps in The DCU after the Arcs Green Lantern: Rebirth and Green Lantern: Recharge.
 * The Nova Corps in the Marvel Universe went through something similar after the Annihilation: Conquest story.
 * DC's Shadowpact is revealed to be an unknowing revival of an ancient order that appears once every few years, in different forms, with different purposes but under the same name. It is revealed, by the Phantom Stranger, that the Shadowpact always fails.

Film

 * The New Jedi Order established by Luke Skywalker from the Star Wars Expanded Universe is the archetypal example.

Gamebooks

 * After gathering the Lorestones, Lone Wolf is able to re-establish the Kai Lords twenty years after their destruction.

Literature

 * The Inheritance Cycle is apparently going this route.
 * This relationship between the Michaelines and the Knights of the Anvil in the Deryni works is alluded to from time to time. When the Michaelines were suppressed in Gwynedd, many members sought sanctuary with the Anvillers, bringing their knowledge and some of their portable wealth with them. While the Anvillers have other influences (including Muslim ones), they seem to be a mixed human/Deryni military order that eschewed the spotlight of political prominence that Michaelines had, perhaps so as to avoid the Michaelines' fate.
 * The Order of the Phoenix from Harry Potter, which was La Résistance during the dark times when Voldemort and his Death Eaters were wreaking havoc. Once Voldemort returns (despite the vehement insistence of the Ostriches at the Ministry of Magic), the Order reforms... although it's only been 15 years, so the Order is primarily composed of its (surviving) original members.
 * Done on a massive scale in Andrey Livadny's The History of the Galaxy, where the Confederacy of Suns and its military are dissolved after 1000 years for lack of external enemies and the desires of the colonies for self-governance. After just 20 years, humanity is attacked by a previously-unknown alien race bent on crippling and, possibly, wiping us out. It is up to a few soldiers, headed by four veterans of the Confederacy to defeat the overwhelming enemy and restore the Confederacy for common defense. One of them, a young woman, becomes the first President of the Confederacy, despite having no prior political or governing experience. Later novels show a rebuilt Confederacy after only a few years, its mildest back to full strength, despite many of the ships and Real Robots being scrapped at the end of the first one.

Live Action TV

 * High Guard from Gene Roddenberry's Andromeda.
 * The High Guard as described seems more like an ordinary Space Navy.
 * In Babylon 5, the Rangers.
 * The JSA in Smallville.
 * In Power Rangers, this sometimes goes hand-in-hand with Great Offscreen War. Sometimes the Sealed Evil in a Can was originally sealed by a Ranger-like team and the new team are the successors to that power, led by the Old Master who is crazy old and was there for round one.

Video Games

 * The dragon-riding Order of the Flame from Drakan games.
 * Oddly enough, even the Old Jedi Order is one of these in Knights of the Old Republic II (with you as The Obi-Wan).
 * In The Elder Scrolls IV: Knights of the Nine, you can reestablish the eponymous chivalric order that was disbanded some 200 years ago.
 * In The Elder Scrolls V Skyrim, you can help reform the Blades by bringing in new recruits to Delphine.
 * The Order of the Silver Hand from the world of Warcraft. The Paladins of the Order served to defend the human kingdoms through the second war and a bit of the third war as Light-empowered healing-capable knights, but were disbanded, inWarcraft 3 by a crazed Arthas when Uther the Lightbringer refused to help him purge the plague-infested town of Stratholme. Most of the Paladins themselves, including Uther, were killed shortly afterwards by Arthas and the Scourge after he became a rampaging Death Knight. A decade later, in Wrath of the Lich King, the Order was recreated with the help of Tirion Fordring and the Argent Dawn, following Arthas and the Scourge's defeat at the Battle of Light's Hope Chapel. The reborn order was christened the Argent Crusade, with the purpose of taking the war to Northrend, and finally, finishing off the Lich King.
 * There's a bit of irony in that, as Fordring was exiled from the order by Uther for helping an old orc.
 * This sort of happens in Dragon Age: Origins. While there are other Grey Wardens on Thedas, you and Alistair are the last of the Wardens in Ferelden after the Battle of Ostagar. By the end of the game, your victory over the Fifth Blight redeems the Wardens' reputation in Ferelden -- it's mentioned earlier that the Wardens aren't very popular in Ferelden due to a past Warden's attempted coup. In Awakening you have to start conscripting new Wardens after the ones from Orlais are all killed/captured by the Darkspawn, taking your journey full circle from conscriptee to conscripter.
 * At the end of the second prequel book, all that's left of the Wardens in Ferelden are Duncan and, both relatively new recruits. Duncan is charged by his superiors in Weisshaupt Fortress to rebuild the order in Ferelden. He succeeds but not enough to stop the next Blight.
 * In Assassin's Creed Brotherhood, Ezio sets about rebuilding the Assassin order in Rome, after the destruction of their primary base in Monterigionni. Unlike most Order Reborn plots, the Assassin brotherhood's support infrastructure is still intact, but the membership needs to be completely rebuilt and reorganized in a hostile area of Italy being dominated by their enemies. Once Ezio starts recruiting dedicated Assassins, he can dispatch them to support other Assassin operations across Europe.
 * While Ezio can only recruit up to 12 assassins, by the end, they can all achieve the rank of Master Assassin and, therefore, be able to, theoretically, have recruits of their own.

Web Comics

 * The protagonists in Angel Moxie.

Web Original

 * The Resistance in Lonelygirl15, although a shadow of its former self.

Western Animation

 * The new Storm Hawks from, well, Storm Hawks.