Yeah. Jordan is good at dropping hints. I mean, Verin was a pretty big one, and she was hinted at being Black, at least. Ingtar was strongly hinted at being a darkfriend, too.
I think the theory also fails because we just don't know how the Forsaken were before their turning. Not those you're referring to, at least. There's not enough info on them to make a good comparison.
I also think that Leo makes a very good point; Nynaeve has grown up hating the Shadow. She...
Since the Last Battle's about to start, I don't really think there's time to 13x13 somebody else, aside from those in the Black Tower. I could see Pevara being turned, for instance. She's not a main character, but she a PoV-character at least, that we've seen quite a bit of. Not that I hope...
Yeah. If Rand doesn't send help, she'd face an army of shadowspawn at Lan's side, just the two of them, before she'd swear to the Shadow.
She'd never swear, not like that. If she would, I'd say perhaps under intense torture? But I guess that would go for most people, really. Except a few, like...