By the way, I found a different preview: http://youtube.com/watch?v=g_tmnjeCfyE.
Anyway, look at the below picture:

Why are Hiro and Ando on top of the Deveaux building? Furthermore why is Ando there, wearing a security guard uniform? If you look close enough, you can see that the windows are broken. I'm not sure if that is the future, but you can tell that Hiro has his sword!
