Will USGS maps of other scales be updated?

Maybe, but probably not soon. The US Topo project's priorities are to achieve full coverage and maintain a short, regular refresh cycle for the 50 states, Puerto Rico, and the Pacific Territories at scales of 1:20,000 to 1:25,000 (depending on the area).  US Topo maps at 1:100,000 and 1:250,000 scales are possibilities, but no specific plans have yet been made.