I was looking over one of the topics around who is in the Banner at the end of the trailer and i was reading and i saw something interesting in someones comments, and because i haven't read the books so i don't know very much about what actually happened at Reach i can only speculate but i read that a massive army of covenant came and obliterated all the spartans and soldiers that were on the ground then glassed the planet so now nobody knows what is going on there. so couldn't this game, if the halo 3 legendary ending has nothing to do with this game and it is not a prequel to the actual battle on Reach, be about any survivors the were left on Reach after the Glassation of the planet was performed. now remember i haven't read any of the books so people would have to fill me in if the story under the glass has been told or if in theory there could be survivors.