Do you honestly think that George Lucas, recently retired and immensely wealthy, would spend his time contributing to a DC CW TV series? Of course not. Now, do you think Legends of Tomorrow might do an episode where its time-travelling heroes have to help young George in the '60s? Of course it would.
However, the episode is going to be more than the Legends' timeship inspiring George to eventually write Star Wars. In the midseason finale, it was revealed that former captain Rip Hunter was actually making movies himself in 1967, having appeared to have lost his memory and his British accent. According to producer Marc Guggenheim, Rip's new job creates a time aberration that causes George Lucas not to make Star Wars, which of course the Legends have to fix. But the stakes are higher than just the fate of the movies. As Guggenheim told EW:
Because of circumstances, the time aberration in episode 209 is George Lucas quits film school. As a result, he never makes Star Wars or Raiders of the Lost Ark. As a result, Ray, who became an engineer because of Star Wars, and Nate, who became a historian because of Raiders, slowly start to lose their brilliance, because those things that inspired them to become who they are didn't exist.
That's a neat twist on what at first glance seemed like it was going to be a very obvious plot. Given recent events, I like the idea of reminding people that while they may just be movies, Star Wars created heroes both on and off-screen.