Var Luke och Leia ursprungligen planerade att vara relaterade?

Nej .

Att citera från mitt svar till Leias musikaliska tema :

Till och med ett tidigt Leigh Brackett 1978-utkast till The Empire Strikes Back "hade inte det förhållandet etablerat ännu - det introducerades senare (Källa: länk ).

En annan relaterad bevisning för Luke och Leia som ännu inte var relaterad var 1978 pre-ESB-bok som var en uppföljare till "ANH" - Alan Dean Foster's " Splinter i sinnets öga ". Det utvecklar temat romantiskt intresse mellan de två (förmodligen delvis, eftersom Foster och Lucas inte visste om ANH skulle bli en stor hit och om Harrison Ford skulle vara intresserad av uppföljaren skulle uppföljaren vara baserad på "Splinter" ).

Enligt Lucas, ja.

Men wookieepedia har detta att säga om förhållandet i Splinter of the Mind Eye (den första Star Wars EU-bok):

At the time it was written, the familial relationship between Luke, Leia, and Darth Vader had yet to be revealed. Therefore, some inconsistencies are evident and unavoidable. Most noticeably the sexual tension depicted between Luke and Leia in this book, which in retrospect would be considered inappropriate in most countries. (Although Lucas claimed to have had the Star Wars saga mapped out even at this early stage, the fact that he allowed this plot element to remain in Foster's novel has been cited as evidence that he hadn't yet decided on the characters' true backstory.) However, Lucas has stated before, that this tension was on purpose, to show that the two had feelings for one another, but that they did not know exactly what type of feelings.

En del bakgrund på Splinter:

Splinter of the Mind's Eye was the first-ever Expanded Universe novel to be written and published. According to an interview with its author, Alan Dean Foster, in Empire magazine, the novel had been written to be filmed as a low budget sequel as a fallback plan in case Star Wars hadn't been a huge success. This accounts for why the book takes place almost entirely on a fog-shrouded planet. Additionally, Harrison Ford was not signed for the sequel as of the writing of the book, which is why Han Solo does not appear in it. Although George Lucas is credited as the author of Star Wars: From the Adventures of Luke Skywalker, the novelization of Star Wars Episode IV: A New Hope, was in fact written by Alan Dean Foster. Foster's early involvement in the Star Wars universe gave him the opportunity to write this book. Though Foster was granted a great amount of leniency in developing the story, one requirement was that a lot of props from Star Wars Episode IV: A New Hope could be reused when filming the new film. According to Foster, Lucas' only request upon inspecting the manuscript was the removal of a dogfight in space undertaken by Luke and Leia before they crash-land on Mimban. Presumably, this sequence would have cost too much money to create.

Nej. Han Solo i ett gammalt manus kanske inte har överlevt. Och även om han gjorde det fanns en chans att han visste att Leia och Luke verkligen var kär. Det var en större triangel mellan dem. "Twins bit" blev bara snabbt kastad i för Jedi Return.

Jag håller inte med [med de andra svaren.] Det är etablerat i Empire Strikes Back att de är bror och syster. Nära slutet, när Luke hänger på stadens [undersidanantenn], ber han om Ben och får inget svar. Då säger han "Leia, hör mig, Leia" och hon hör honom genom kraftens kraft och etablerar henne som den andra.