I know MGM has Epix, but this is how I'd imagine if Warner Bros, MGM, Universal, and Disney would all have their own premium movie cable channels.
AT&T would own Warner Bros. and HBO.
Verizon would own Metro-Goldwyn-Mayer and Epix.
Comcast would own Universal Pictures and Debut Network.
Disney would own Walt Disney Studios and Teleplex.
And Sprint would own Paramount Pictures and Showtime.
I own nothing.