This one caught my eye:
Where did that come from?
A couple weeks back a link was posted on the BSN to an article written by someone who had some hands on time with DA:I. From what I recall Leliana wasn't mentioned by name, but the article seemed to be referring to her. It touched on the consequences of your decisions, and mentioned that you could send an agent undercover into Redcliffe, but that the she'd end up captured and tortured by rebel mages, and as a result she would develop a more hostile view of mages after her rescue.
Because of the trailer with Leliana being captured by mages, it was assumed she was who the article was referring to. Maybe someone else posting here remembers it and saved the link.
Of course I can't say whether or not that was TV Tropes' source.