Well, I think we may have seen the beginning of a transition for one of the characters in that triangle to begin pursuing his true destiny in book 5. That, and at some point we'll finally come across the lone survivor from the Tower of Joy, who can shed some light on the truth of what happened at the end of Robert's Rebellion.
And DAMN, does it take a lot of effort to make the discussion of this theory come across as both cryptic and spoiler free!