It's funny how
Depends on who you ask. Officially the reason for lack of content is because of the tech-update taking way longer than expected to be done. There's a mix of other claims by people here that DC is milking this tech-update out on purpose.
- The tech-update is focused on recoding the whole game because it sucked and was a pest to work with.
- Bringing the whole game to 21:9 aspect ratio so we don't have those black bars anymore and fills the screen up nicely. That means redoing all of the art to fit the screen.
- Reposing character assets
- Improving UI and some art
The scope has seemingly increased though, to what extent is not sure but DC has worked on a lot of art, both new and improved, so we might see this update as a full overhaul of the game as opposed to just being purely technical enhancements.