Mainstream comics are a medium characterized by unceasing long-term consistency. Both Marvel and DC experience small changes now and then – last year’s “death” of Peter Parker comes to mind – but eventually everything returns to the status quo – as did Peter Parker in yesterday’s Amazing Spider-Man (2014) #1, which I will be reviewing in the coming days (I’m such a tease!). Crossover events are the source of these temporary shake-ups. Back when big events became popular in the mid to late 80s (DC’s Crisis on Infinite Earths kind of began the trend) they were few and far between, but their effects were actually lasting to some extent. These days, though, both companies put out at least one crossover a year, encompassing most of their characters, and leading to changes that will be negated by the time the next one rolls around. Marvel’s last event, Infinity, wrapped up in November, but they are already prepping for the next one, with the prelude issue #0 of Original Sin.