Reminder: I don't own Attack on Titan or this story. This story belongs to ii-phoenix-ii on fanfiction.net. The Survey Corps group returns and watches Attack on Titan Season 3 Part II. [No Pairings]
This is an offshoot of Kyle's RWBY Universal Trailers story. Basically after trailer 30 the cast watch scenes from the trailer worlds they had previously seen.
After an event that destroys Ruby and friends universe, they are saved by Uatu, The Watcher. As he fixes their world, they get the chance to learn from their mistakes by viewing others.