post skipped over Neal Adams' and Dennis O'Neill's 1969-1983 remake of Green Arrow which transformed GA from a generic comic book hero into the character we know.
In 1989, there was a Green Arrow and Speedy Secret Origins (see here) and, in 1995, Chuck Dixon wrote a Green Arrow Year One Annual. One way to revise GA origin stories is to change what happened on the island. In the Year One Annual, young Ollie, given a bow and arrow at Christmas, goes into the grounds of the Queen mansion and kills a rabbit. This is the equivalent of young Bruce running in the grounds of Wayne Manor and falling into the Cave.
Both The Longbow Hunters and GAY1 reference Howard Hill. Errol Flynn playing Robin Hood influenced Ollie in the same way that Tyrone Power playing Zorro influenced Bruce.