So setting aside the debate on whether or not Omega is the very same one from FFV or simply a fan-service re-imagining, I've been trying to think on how Midgardsormr fits into all of this.
- He seems to be intimately familiar with Omega, knowing where he comes from and the nature of his abilities.
- He also comes from another world, and came to Hydaelyn bearing the eggs of his brood, wherein he made a pact with the Mothercrystal. This always seemed like the desperate act of a refugee...
- Omega was found having been buried for an unknown amount of time, covered in damage that he was repairing through the use of aether.
- Omega's traditional rival, Shinryu, was summoned as a primal by Ilberd but the name was not bestowed by Ilberd himself. The primal was named Shinryu by the Domans who recognized it from folk lore. This implies the possibility of a true Shinryu existing somewhere in Hydaelyn's history given the game's habit of tying mythology to real events.
To be blunt, I'm becoming convinced that Midgardsormr may actually be the real Shinryu. His familiarity with Omega is enough to argue the case that they came from the same world. Omega was clearly fighting something when he crashed on Hydaelyn and I would suggest that Midgardsormr was either fleeing the destruction of his world at Omega's hands OR has remained on Hydaelyn to stand vigil should Omega wake. The Doman tales of Shinryu were likely inspired by some actual interaction with Midgardsormr in the distant past.
With all this in mind as a huge 'maybe', I wouldn't be surprised if we get to have a rematch with Midgardsormr as part of Omega's little experiment.
