This has been confirmed by RPGamer to have been a joke.
They had two jokes, one being that Sakaguchi had conducted a hostile takeover and was back in charge of Square, and two, that this "FF7:EC" was announced for the DS.
The first joke was okay, but the second one was lame in that it was completely reasonable, except for the one small reference to the "SquareEnix takeover" that was included in the story.