Obi-Wan's father?
Ok, a theory, evidenced by lines in the movie:
Exhibit A:
Palp: "I need your help, son." -> proof that Palpatine is Anakin's father.
Exhibit B:
Obi: "You were my brother!" -> proof that Anakin's father is also Obi-Wan's father.
The inevitable conclusion: Palpatine is Obi-Wan's father!
That would make Owen Lars... Obi-Wan's stepbrother, I guess. See? The old "Obi and Owen are brothers" theory was right. Kinda. From a certain point of view.
And no, I'm not being serious, of course. 🤣