Really? I liked Reach a lot, but Halo 3 was my jam. Reach was the one that introduced jet packs, right? I did like that, but I just liked Halo 3's campaign so much that I'd play it twice, back-to-back, in a day. I also thought the online play was the best, but my memory deceives me and I may not be recalling how good Reach was. I believe Reach was the one where you could fight off ever-increasing difficulty waves of enemies, is that right? I did really enjoy doing that with a buddy of mine. Many hours were played doing that.
I had not seen that trailer until I just watched it now. It looks friggin' sweet!