Shia interview reveals some plot spoilers.

[griffin]

Probably not spoilers if you've seen the new trailer, but he goes into some details on the point of this second movie, and the heavy focus on the weird symbols.

http://www.iesb.net/index.php?option=com_content&task=view&id=6866&Itemid=99

Be aware that there is a fair bit of coarse language in the interview.