User blog comment:Commdor/BioWare Reveals ME2 PS3 Content Details/@comment-217683-20101106044856/@comment-730941-20101106065502

I interpreted this as a future DLC pack that they haven't announced yet, almost a mini-expansion (a moderator on the Bioware forums made a reference to an 'expansion' a while back).

If it is extra content that the PC/Xbox versions don't get, it would be indeed disappointing. I can't see the logic of developing content for one platform and not porting it to others, though. Their market for PS3 ME2 may be less than the combined Xbox/PC player base, so it makes sense to make the content as widely available as possible.