So I read this on IGN: http://www.ign.com/articles/2012/07/...ct-big-secrets. It's a bit embarrasing, but I'm really happy they do that, because I have no disciplin. Whenever new footage is shown I have to watch. For Revelation they showed too much imo. For example they spoiled completely the biggest set piece in the game (the ship and fire one), which just made it very anti-climactic to me. So if that "pitched battle" is happening I'm rooting for Alex!
Also I wonder what those two major systems might be?