No concept art or even class names have been announced so far. Unlike most of the other capital ship classes, battleships were never promised as a stretch goal.
It is unclear if the UEE actually fields ships in this class. Only mention was in Lore Builder 13, describing UEEN Ship Class Designation, but that could be legacy from earlier eras.
- Comm-Link:Lore Builder 13. Spectrum Dispatch - Comm-Link