If the Back to the Future and Jaws rides and the Ghostbusters Spooktacular stage show were still at Universal Studios Florida to this day instead of being replaced by the Simpsons ride, The Wizarding World of Harry Potter and Race Through New York Starring Jimmy Fallon, it would make sense for those three floats to be in the parade. Plus, a replica of the Ghostbusters' car known as the Ecto-1 would also be in the parade in front of the float too, except the Ecto-1 would probably be rebuilt to look exactly how it was seen in the 1984 film down to the last detail.
Great question! At the time of the release of the Kenner starwars line George didn’t have set in stone how the characters should be spelt. This was actually a quick put together to get these toys out at the time.