Voadam
Legend
In the early days, people not only incorporated Star Wars stuff into their game, they used D&S to play Star Wars.
I had a friend in my D&D group in the 90s who said he used Cylons in his D&D campaign because everybody was using Stormtroopers and Sith in theirs.
Same group I remember a story about a fight from before I joined the campaign between a high level fencer, someone playing Hagar the Horrible, and Vader, with Vader ignoring most of the critical hits against him from the fencer who kept piercing his cybernetics.
In the campaign we eventually came across Sith who combined psionics and tech. One of our group's PCs reincarnated into a Sith psionicist.
Same campaign my viking merchant prince character was in diplomacy talks with Elric while visiting drowesti elven Melnibone, it was a lot of fun even though Stormbringer killed his wife right in front of me and almost slaughtered everyone including me and all the present PCs.
Other variant famous things in that campaign that I interacted with included Mordenkainen but a female elf, Moorcock and Warhammer Chaos, Vlad Tepes as ancient vampire ruler of Dacia I did diplomacy with, Middle Earth's seven walled city (which I did not recognize as such when encountering it in game), Lankhmar gods, Moorcockian gods and demon lords including a lot of Meerclar great cat cult followers as a major religion, a former PC illusionist named Lord Blackstone, and the Isle of Roke with archmage wizards running an extraplanar D&D wizard school.