the answer why no release... ever... and spoliers with ending
it will not be released, ever, no matter what...... ever: MAJOR SPOILER:
the twist at the end of the movie is that they have all been dead nearly the entire movie because of a catastrophic decompression accident, then they flew over 5 hours without calling anyone and crashed.... this is currently the one of the top theories, if not the top, for the Malaysian Airlines 370 crash in the Indian Ocean and this script just happened to hit the nail exactly on the head... no way is the studio going to take the heat in the press for releasing something like this
so forget about ever seeing it in theaters... maybe never on DVD either