Conversation so far:
What was Star Wars: Episode IV – A New Hope?
Star Wars (retroactively titled Star Wars: Episode IV – A New Hope) is a 1977 American epic space-opera film written and directed by George Lucas.
Was Luke Skywalker in Star Wars: Episode IV – A New Hope?
In Star Wars: Episode IV – A New Hope, Luke Skywalker lives on a moisture farm on the desert planet of Tatooine with his Uncle Owen and Aunt Beru.
Does Luke Skywalker have any children in the film, Star Wars: Episode IV – A New Hope?
Is the film, Star Wars: Episode IV – A New Hope a sequel to Star Wars: Episode III – Revenge of the Sith?
Star Wars: Episode IV – A New Hope's success led to two critically and commercially successful sequels and later to a prequel trilogy, a sequel trilogy.

Question: How many were they planning on making at this time?
Self-contained rewrite: How many prequels and sequels was George Lucas planning on making at during Star Wars: Episode IV – A New Hope's release?