When Sony and Insomniac Games unveiled the first teaser trailer for Marvel's Spider-Man: Miles Morales, fans of the comic book character were understandably excited. Except it wasn't super clear just what this game was going to be. Was it a full-on sequel? A DLC? Well, turns out that the subtitled game is going to be a standalone, somewhere between a DLC and a full-on sequel. That's still a bit confusing, and a new trailer for the title doesn't really clarify things much. However, Insomniac Games' Brian Horton, the creative director on the game, …