7. Spider-Man Blue
Given the way the current Andrew Garfield Spider-Man movies are going, this one seems like a given. Spider-Man Blue is Peter reminiscing about his first love, Gwen Stacy, on Valentine's Day with his true love MJ. It's a heartfelt story that shows how Peter lost Gwen to the Green Goblin. It's a natural next move because the current love interest in the movies is Gwen and the new movie introduces Green Goblin (or Harry Osborn at least), so the direction of the movie series could be the famous Gwen Stacy death by the Goblin. It's probably not a storyline that would fill an entire movie but it features a lot of characters that are already in the Spider-Man movies: Gwen, Green Goblin, Rhino, and shows the transition from Gwen to MJ as the love in Peter's life, so it'd make a good part of the larger story.