so why is the new BR being released by 20th Century Fox?
20th Century Fox has an agreement with MGM through 2016 to distribute its home video products. As part of the agreement, Fox also oversees electronic-sell-through for MGM movies, in addition to Blu-ray and standard DVD discs.
Fox first began distributing MGM films for international home video in 1999, and took over U.S. distribution from Sony in 2006.