And I am about to sign off this particular forum for a long time (until there is something substantial and set in stone). For the next few months people are going to be arguing and whining, and speculating. All off of basically nothing, since really, Bungie did not reveal anything note worthy in the trailer.
Its one thing I cant stand about Bungie, is how good and resilient they are in secrecy. Id be very surprised if they spill the beans or show us anything worth while on Reach before the fall.