Board Thread:Lore Discussion/@comment-18016240-20131125000510/@comment-24.185.108.132-20150309174507

Talos can't be reincarnated because Talos did not simply die, he mantled Lorkhan and ascended to Godhood. Further, because of CHIM, his identity and sense of self are permanently secured. It's also important to note that Talos was not one man, he was three: Hjalti Early-Beard, a Breto-Nord, Ysmir Wulfharth, an Atmoran, and Zurin Arctus, whose racial origin is unknown but is speculated to either be Imperial or Tsaesci.

It is entirely possible that the Last Dragonborn is a Shezarrine, an avatar of Lorkhan, an he is most certainly connected to Aka by virtue of being a Dragon.