Keep in mind AA/DL will be ADDING seats in J in the coming years. Don't expect UA to be staying put with future Dreamliners, specifically 788s and 78Js given their low J seat counts. High J 788 could easily replace both the existing High J 767 and the low J 767 just because of the seat count for the 767 is so low and the 788 can pack in the seats being nine abreast. The 788 seats more than the unreconfigured 764.