I think they will include the 4h30 making of Documentary. It's like for Jaws. They included a shorter 55 min Making of the first time when Universal doesn't make 2 discs dvd release.
And now, they change their policy and we have beautiful 2 disc set of Jaws with the complete 2 hours Documentary, port from the Laserdisc.
but for The Frighteners, maybe it will be a 3 disc set.