We have a tendency in this thread to use the word "dark" a lot, but sometims I wonder what people qualify as "dark".
So far this game has dealt with a lot of what I would call "heavy" themes, like the drug/prostitution thing and Maya's fear of being outed, but it hasn't really had anything yet that could be considered too dark, but what would that be if it does? Thinking back to AL, it too dealt with a lot of heavy themes like Melissa's domestic abuse and Liam's cancer, and it only became dark when we discovered Leah was a psycho, stalker, pyromaniac killer. Right now, everyone is looking at Bella to be the one with the dark storyline because of the locked door and the mystery of the missing husband, but I personally don't think that, whatever her story, it will be "dark", just "heavy".
Maybe there's some tragedy there, something that might ellicit some tears from even the hardiest of players, but I don't think it will reach the level of "dark", especially not AL dark. Personally, I don't think anything will get that dark, even Quinn's story. The "AL effect" is making people think it will get that dark because DPC did it before, but I'd like to believe that this game will deal more with heavy, emotional storylines rather than dark, destructive storylines.