User blog comment:JakePT/Mass Effect 3 to be Revealed at VGA Awards?/@comment-1691295-20101120023945/@comment-730941-20101120024651

A good summary.

I've also heard that the building/field in the original video looks somewhat similar to the British Houses of Parliament - that would seem to tie in to the MI6/SIS reference. I've yet to see this confirmed though.