User blog comment:Master Sima Yi/AC: Brotherhood - The Story Trailer/@comment-24.114.234.38-20101018192707/@comment-84.16.208.119-20101018214106

Notice Ezio is wearing Altairs armor. It has been said that AC:B pick up right where 2 left off, so this is probably some escape from rome-kind of mission right after we've seen the vault, which explains why Mario. The siege of Monterregioni is probably the next sequence.