“No, Leia was definitely not Luke’s sister circa TESB. There are deleted scenes that illustrate this in spades - as well as the Marvel adaptation of the film. It was a love triangle, pure and simple.”- this is a correct statement and there are plenty of articles in publications such as Star Wars Insider , Starlog , Cinefex , Fantastic films etc to back it up as well as the making of books by J.W.Rinzler . I have many of these publications in storage boxes and will have to spend some time digging them up .
Did you ever see/read the ‘Clone Wars revealed’ article (not sure which mag - Fantastic Films? - or the exact title) that explained how Vader would turn out to be a clone of Luke’s father and Boba Fett was actually the original Skywalker in disguise? Obi Wan was a clone too (Obi-1). Pretty wild stuff. I remember a friend of mine, upon having just seen RoTJ, saying “meh, they should’ve gone with the ideas in that article…”!