First Overwatch 2 and now four months after the release of Diablo 4—Blizzard has just launched Diablo 4 on Steam!
Diablo 4 Patch 1.2.0 and Season 2 Release Times Diablo 4 Build Planner Now Live
Community Manager Lyricana has clarified that your characters and progress carry over as long as you log in with the same Battle.net account.