Early access is out now on their website: https://www.ug1775.com/
it only currently includes the American campaign from 1775 to 1776.
Should be released sometime next year.
This one looks very different from Ultimate Admiral Civil War. Instead of a series of battles that gets fought in the same order every time, there's a real time strategy map where you raise and move your armies around the map.
Kinda looks like everything outside of the battles has been expanded greatly from the ACW games they put out.