Not confirmed yet, but looking like it may be 12 stalls in size based on a signage permit that was filed a few days ago.
https://www.omahapermits.com/PermitInfo2020/Cap/CapDetail.aspx?Module=Permits&TabName=Permits&capID1=22SGN&capID2=00000&capID3=00223&agencyCode=OMAHA