So I was playing through portion of the endgame that takes place in Sovngarde and I was bothered by the fact that the heroes initially say that Shor had forbade them from facing Alduin, but what seems like a few moments later they're rushing off by your side. Then it hit me: is the Dragonborn possibly mantling Shor? Whose words would carry enough authority to convince them to join you?

i dont know to much about shor, but would a highelf ever been dragonborn of shor was a... whatever you're saying =p

It's entirely possible. After all, it is the Space God's MO to intervene in mortal form protect Mundus from the mer/Time God. And he's also come in many forms, such as Wulfhearth, Pelinal, and Talos is his stand in for his Shezarr aspect.

Also to add, Shor/Shezarr/Lorkhan is the mirror brother of Akatosh/Alduin/Auriel.