Okay, so after giving it a lot of thought (because of my limited knowledge of non-Disney Parks attractions and my love for theming above all else) and decided to do one for Marth.
For the ride itself, I decided to base it off of the only-recently-defunct EPCOT ride, Maelstrom.
Maelstrom, which I'm happy to have gotten to ride before it went kaput, was a fairly standard log flume ride, but was notable for its sense of Norwegian culture, fitting for an EPCOT ride. You would take a vikingesque ship (there's probably a more accurate word for these but I don't know it off hand) and sail through a labyrinthine ice cave, beset by magical trolls. The ride would then spill into a theater after the final stretch, showing a documentary about Norway's history.
So for this version, the ride would be titled "Anri's Way," the legendary and perilous in-universe route that Marth's great grand-uncle, the mythical hero Anri, took to reach the Ice Dragon Temple and receive Falchion. Chapters 11-14 of (New) Mystery of the Emblem feature Marth conquering that same route against all odds, with the final stretch (13-14) having a very icy appearance (complete with rivers), given the beasts that make their home there. Combine this with Archanea's rich lore and history, and I believe the ride becomes the perfect fit for a Maelstrom substitute.
The trolls would be replaced with ice dragons, of course, sending the boat careening back with a blast of cold wind instead of magic. You'd be able to see and hear the battle raging outside of the Temple, with Marth leading the charge, before finally reaching the Temple and Lord Gotoh. At the end, instead of a film reel dedicated to Norway, it's one dedicated to the continent of Archanea, done in a style reminiscent of if Archanea really existed.
The ride's queue would be modeled after Maelstrom's, but also at take inspiration from EPCOT Norway's little Viking museum. The room would be adorned with a map of Archanea lining the walls, alongside glass display cases housing "Archanean artifacts," in the forms of some of Archanea's powerful legendary weapons. The Hammerne and Aum Staves, the Wing Spear, Mercurius, Gradivus, Parthia, Hauteclere, Aura, Excalibur, Starlight, the Divinestone, and Falchion itself would all be on display, with each "exhibit" going into each weapon's history. The obligatory attached gift shop has the cashiers dressed as Anna, and outside the pavilion there's a meet and greet spot fashioned after an Outrealm Gate, allowing for non-Archanean Fire Emblem characters to appear there without breaking the theming.
I like theme park brainstorming.