According to Lucas' ex-wife, Marcia (the same woman who saved the entire franchise from being an absolute shitshow), at one point George was toying with the idea of revealing that the two beloved characters shared a parental lineage, as opposed to just a love of badass helmets.
Of course, this would have made some of the scenes in the original trilogy super weird, unless Lucas made yet another Special Edition with a voiceover of the two locking down Thanksgiving plans between evil schemes.
"I had Palpatine at Easter; it's your turn."
It also would have made Boba Fett Luke and Leia's uncle -- you know, the type of wacky uncle who lets you try a sip of his beer at dinner, then freezes your best friend in carbonite. Lucas ended up changing his mind because the whole idea was "too hokey," which still doesn't explain Jar Jar's accent, dammit.