With the release of Batman v Superman: Dawn of Justice just over a month away, the marketing machine is at full-throttle. Away from the usual trailers and TV spots, one of the more interesting endeavours is a tie-in with Dr Pepper, and with certain character-branded cans of the drink come access codes to prequel comic books, exploring what happened in the weeks and months leading up to the events of the movie. These revolve around Batman, Superman, Lex Luthor, Lois Lane, and Senator Finch, and all of them feature some very surprising reveals about both this release and the DC Extended Universe in general. The past couple of years have seen a lot of spoilers for the movie do the rounds of course, and these comics both confirm and debunk a number of those as well as offering some insight into the motivations of many of the new characters. Not to mention a much needed look at what makes the brand new Caped Crusader tick. Is he really the killer that some recent reports have indicated? That question and many more have now been answered, and here you will find the seven biggest reveals from the leaked comic books (which, inevitably, are already being taken down). Needless to say, as much as that recent trailer for Batman v Superman appeared to reveal, it seems as if there are still plenty of surprises on the way.