Matt Hardy made the announcement about the WWE 2K18 Hardy Boyz DLC via his Twitter account:
Players will have to be careful after downloading Matt and Jeff Hardy, as they wouldn’t want to delete them!
This news comes after the developers detailed the new WWE 2K18 story mode (full details at the link) for the game:
In WWE 2K18, we wanted MyCAREER to focus on a strong story narrative. We felt the addition of backstage could afford us some cool new ways to experience a day in the life of a WWE Superstar. For us to accomplish this, we needed to develop unique and compelling storylines that are no longer shared from Universe Mode so the journeys that MyPLAYERs go through are unique and fresh.
This year, you’ll have two very different paths you can take en route to your own WrestleMania moment (note: you will be able to play past that WrestleMania moment; your story won’t end there).
It was also recently confirmed that The Rock would be the soundtrack’s executive producer:
2K has announced that Dwayne “The Rock” Johnson will be the WWE 2K18 Executive Producer. The actor and professional wrestler will curate the game’s 11-song soundtrack, which is currently streaming on Apple Music. Highlights include Kanye West’s “Black Skinhead,” Boston’s “Smokin’,” and “Boyz-N-The-Hood” by Eazy-E.