The BBFC (British Board of Film Classification) has some info on a Mass Effect DVD which could be in the Limited Edition. I found a post on the official Mass Effect forum linking to the BBFC website. I've been waiting to hear what will be in the Mass Effect Limited Edition and this could be a valid clue. Details are shown below:


MASS EFFECT LIMITED EDITION XBOX 360


This work was passed with no cuts made.

The BBFC has placed this work in the DVD Extras genre(s).
The main spoken language in this work is English.

Directed by Not known
The cast for this work includes: .

When submitted to the BBFC the work had a running time of 75m 50s.

This work was submitted to the BBFC by Microsoft .

Show details for [<font size=2 face="Arial">]General Remarks[<font>]General Remarks

This work is made up of a number of separate components.
Note that since February 2001 the BBFC has measured each component separately, but older works may not have the exact details, only a list of titles.
n/a MASS EFFECT LIMITED EDITION DISC
00:01:16:00 INTRODUCTION
00:07:14:00 THE VISION OF MASS EFFECT
00:20:51:00 THE MAKING OF MASS EFFECT
00:08:35:00 INTERACTIVE STORYTELLING
00:18:00:00 INSIDE BIOWARE
n/a SOUNDTRACK
00:00:21:00 INTRODUCTION TO THE DESIGN GALLERIES
n/a DESIGN GALLERY (614 IMAGES)
n/a GAMERPICTURES AND THEMES
00:01:10:00 2005 - X05 TEASER TRAILER
00:04:17:00 2006 - E3 GAME PLAY TRAILER
00:05:26:00 2006 - X06 GAME PLAY TRAILER
00:01:23:00 2007 - E3 GAME PLAY TRAILER
00:00:44:00 2007 - TV TRAILER
n/a BLUE DRAGON
00:01:34:00 TRAILER - LOST ODYSSEY
00:01:37:00 TRAILER - HALO WARS X06
00:02:20:00 TRAILER - HALO 3 E3 2007
00:01:02:00 TRAILER - HALO 3 "STARRY NIGHT" TEASER
A film or video, together with associated trailers may exist in several versions and all versions known to the BBFC are listed below.