Uh, yeah, subplot.
I mean, those subplots, and contexts, and what all, kind of make the book of EG more than just another kid-saves-the-world thing. Hey, it's what makes Dune different too! But any film of EG is going to end up seeming like just more Star Wars so you sort of see why Card was hesitant to do it--you figure some big budget studio version is just going to be an action movie that drops much of the book's background and world building. Which it did. But I never cared for that background or world building very much, the book was barely 230 pages and I found myself slogging through it somehow.
Uh, what I'm saying is I guess skip the movie, most of the world did anyway. No, wiping the kids' memories is not in the movie.
And now that I think about it, wasn't the original EG story out right in the wake of Star Wars anyway? 1977, right?