Decided I'd put my idea on what the "Heroic Legacy" may look like. I decided to base the route on iconic moments from previous Fire Emblem games:
Battle 1: vs.
on Tortimer Island (omega) with Lords-A Chance Encounter playing (based on Marth Embarks, the first Fire Emblem chapter ever)
Battle 2: vs.
on Castle Siege (Lava portion) with Beyond Distance Skies playing (based on Chapter 8x of the Binding Blade, where Roy gets Durandal)
Battle 3: vs. a giant
with his 8th palette, with
(default) and
as allies, on the indoor portion of Castle Siege with Against the Dark Knight playing (based on the battle with the Black Knight in Path of Radiance)
Battle 4: free for all with
,
, and
on Arena Ferox with Id Purpose playing (not based on anything in particular, just thought it worked well for the Awakening battle)
Battle 5: vs. red
and gold
, with
as an ally, on Coliseum with Lost in Thoughts All Alone playing (loosely based on the first battle of Fire Emblem Fates: Revelation, where Corrin has to stop Xander and Ryoma from fighting)
Battle 6: free for all with 3 Byleth using the Edelgard, Dimitri, and Claude palette on Garreg Mach Monastery with Edge of Dawn playing (no need to explain what this is based on!)
Boss: Rathalos, to represent how dragons are the final boss in many Fire Emblem games.