I know this may sound ridiculous but: What if Obi-Wan in Episode IV tells Luke that his mother (Padme) wanted him to have Anakin’s lightsaber when he was older? Instead of lying about Luke’s father (as usual)
That way, this wouldn’t be yet another of those “From another point of view” but something that actually could happen off-screen in Episode III
Where would we get Alec Guinness saying “mother” from?