DC Comics, much like their Marvel competition, have made events a focal point of their sales strategy, expanding stories into huge, line-wide sagas. Virtually every major hero in the DCU has had their story blown up into a sprawling event, prompting readers to buy one-shots, miniseries and new titles. These have had mixed impact on DC's overall continuity, with some being forgotten relatively quickly, and others significantly shaking up the status quo.
Source：https://www.cbr.com/dc-events-status-quo-change-ranked/
