This was overlooked. Moreover, it looks like the USL East Bay outfit is on pause. The proposed team is still looking to play, but with most likely a reduced capacity. As of now the USL Championship (Tier 2) season is currently suspended.
Developer Drops Plan For 18,000 Seat Soccer Stadium In Downtown Concord (claycord.com)
The stadium was supposed to part of a combined hotel/residential complex adjacent to the Concord BART station but right now, the current climate is putting mass gatherings such as sporting events on hold. If and when Sacramento joins MLS the East Bay team would be the closest club in the Bay Area.