Announced at the beginning of the year, MTG: War of the Spark events will begin with Prerelease Weekend on April 27, and official release on May 3 (see “'Magic: The Gathering' Teases 'War of the Spark'”).
Lots of changes in organized play will begin with this release (see “'War of the Spark' Ignites OP Changes for 'Magic: The Gathering'”). Including a major rework of Wizards’ OP system (see “WotC Revamps Wizards Play Network”).