*SPOILERS*
Hello, this is my first post. I just got here yesterday when I found my old fandom account:)
When Halbrand was about to kill Adar, Halbrand says "Do you remember me?". Halbrand could be referencing to when Adar "killed" Sauron.
Halbrand is the "king of the Southlands". The Southlands become mordor.
Halbrand stopped Galadriel from killing Adar
After Halbrand stops Galadriel from killing Adar, Adar says "who are you?" and he just keeps walking
Halbrand attacks 4 people in Numenor with just his hands
Halbrand is very interested in crafting
When Halbrand is asked his name he says "depends on how well you know me"
If he isn't Sauron however, I think he is the witch king of Angmar. That was my original theory before I started thinking he was Sauron. We are probably going to find out who Sauron is tomorrow though because of the season finale trailer.
