Teen Titans #13

Part two of the "Then & Now" four-part saga arrives in this October 1997 tie-in to DC's Genesis event, and the cover by Dan Jurgens and George Pérez makes the stakes unmistakably clear. A dominant Flash figure in red and gold charges forward while the Teen Titans — including a smaller Flash, a Robin-costumed hero, and several other young teammates — clash in a chaotic pile-up of lightning, fire, and energy against a mysterious dark silhouette looming in the background. That single word, "CLASH!", says it all: when generations of heroes collide, nobody walks away clean.