Here's the SDCC trailer... it looks like a quick rundown of the pilot (which was pretty dang cool), I think they're still filming season one which is why there doesn't seem to be any new footage.  Of course, I say season one hoping there will be a season two, otherwise what was the point of the pilot?  If it was going ot be a miniseries (which was the original plan), just make the whole d*mn miniseries at once.  Jeezus!