Correct, the potential USL team was mentioned as a possibility by an unaffiliated article that noted that the mayor has agreed to later decide on a development to include either a stadium or mixed development. That article also noted that the task force (the city), wanted 25k, but the developers (not the city), are recommending 15k.The soon to be created USL team was mentioned as a possibility. The MLS team was mentioned as a frame of reference, not as a possibility.
From that little tidbit, the unaffiliated article implies that this is possibly for the potential USL team.