I love the movies that we used to get at the end of instances, the ones with comic book panels and voice overs. I still go back and watch them sometimes. It would be amazing if DoS ended with one of these! I know it's probably too late in the game to ask this, since DoS3 is already on test, but it would be really fantastic!
Since I don't work for Daybreak, I don't know how much it would cost. They do already have the licence for the art used in the base items that drop from the event and a voice actor for Lois Lane. That's a pretty strong place to start!
Games been lacking in cinematic cutscenes, story openings/story endings, and other things for a very long time. If they added short movies like the opening one we see in the beginning of the game, it would make the experience much better. A short movie in the beginning of the episode(showing how it started), and one at the end(showing how it ends(completion), or ends with a cliffhanger). If they did movies like the opener and sold replays and cosmetics with them I’d buy them... probably won’t happen, but I’d buy them if they looked good and fit with my characters.