» Mon May 07, 2012 11:06 am
My theory: (feel free to comment/bash if this goes against established lore)
Hjalti, aka Tiber Septim, was a Dragonborn. Wulfharth was a dead Dragonborn Nord hero-king reanimated by Shor (he wasn't an avatar of Shor until he died, Shor liked this guy and instead of letting him party it up in Sovengarde he sent him back with his blessing, aka his power) Zurin was just a powerful battlemage.
In his early conquests, Hjalti-Tiber uses Wulfharth-Underking to represent him in battles he knows he needs to participate in (but he's too occupied by something else). This leads to Talos mantling Wulfharth, aka Shor.
When the big betrayal for the Mantella comes, Wulfharth is split into three, one aspect goes into Zurin, another goes into the Matella (along with a part of Zurin), the last goes into Tiber (due to them mantling). This allows the Mantella to be activated (though with only a fraction of it's intended power) as well as Zurin to continue existing as the Underking. Tiber, now not only Dragonborn, but a Shezzarine (not sure if that's spelled right) as well as having mantled Wulfharth/Shor and taking place in the whole reenactment of the Akatosh/Lorkhan/Magnus fiasco allows him to take Lorkhan's place in the mythic as Talos (notice I said Lorkhan instead of Shor).
Talos takes the place of pre betrayal Lorkhan. In this theory, while Lorkhan and Shor are the same being, they are fundamentally different. As Lorkhan, he wants to create all of Mundus. Though after he's 'killed' by Aka and exists without his heart (both a source of divine power and compassion), he becomes bitter against the other Divines. So when the Mer begin to worship the Dragon God above all (and demonizing him) Shor decides to help Men fight those who worship his 'killer'.
Then comes Tiber. As a Dragonborn, Tiber is one of Aka's chosen soldiers (a symbol of Aka's compassion to Men). Though after the Mantella incident, he is now a Shezzarine (and successfully mantled Shor). This combination allows him to take the place of compassionate Lorkhan (the one who loved all Creation) not vengeful Shor (the one who hated Mer and loved Men).