April is just around the corner, and that means DC is ready to kick off their latest comic book event, Convergence. Convergence is a big 8-part crossover that will replace DC's normal New 52 comics for April and May. Easily its biggest selling point is the fact that it's bringing back classic, pre-New 52 versions of Superman, Batman, Wonder Woman, and various other heroes. With old heroes returning and different universes mashing together as part of a huge story, it's understandable you'd need a primer to keep everything straight.