User blog comment:Commdor/E3 Coverage of ME3 News Begins/@comment-737801-20110606210550/@comment-3566082-20110606211516

There's a Definitive Addition aswell. Apparently this comes with a pet FENRIS mech, an appearance pack for Liara and another character that looks like it could be James Vega, an N7 arsenal, an additional downloadable mission and character, a hardbook artbook, and a ton of other stuff.