I have avoided Mama up to now because both the critics and the viewing public have had mixed opinions about it. Still it has a terrific cast and the legendarily un-pleasable critic Stephanie Zacharek liked it. I can't believe any film with both Jessica Chastain and Nikolaj Coster-Waldau could be too bad, so may see it soon. ATMOS appears not to be in the cards. Insofar as I have been able to determine, no OKC theater has installed ATMOS.
HT setup: Sony 75XBR X940D UHD HDR TV; Kaleidescape Strato Movie Server 6 TB; Yamaha RX-A3060 AV receiver; Crestron Control System; Hsu VTF-3 MK3 Turbo subwoofer, 6 Hsu HB-1 Bookshelf speakers, 1 Hsu HC-1 Center speaker, 4 Focal ICW8 in-ceiling Atmos speakers; Oppo BDP-103 BD player; Mac Mini HTPC. TiVO Bolt 1TB DVR; TiVo Premiere Elite 2 TB DVR