1 Year Later is not a story arc, but a common point in time that every DC book jumped to following the events of Infinite Crisis. The missing year is filled in by the 52 maxi-series. Because it doesn't make sense to add every book marked with the One Year Later logo, only the jumping point for each book is marked. Unless the title is cancelled, the next 11 issues after the first will also be marked as OYL issues.
Please do not add any OYL marked issues beyond the initial one!