I enjoyed the preview, but I also am a bit disappointed by the lossy look. It seems like many of the previews of reel 1 over the years have looked mushy like this, but some have looked better - I have an old 1080p preview of the crawl/flyover, a 25Mbps MOV file, and while it didn't have the cleanup, it looks clearer and more of the grain structure is intact. I'm flicking through the same frame on both, and some of the faint stars looked brighter and clearer in that old preview, for one example.
Can you try the same encoder/bitrate you used for the ESB Grindhouse? That looked nice and crisp. Not trying to be overly critical, I'm just trying to be constructive. You guys still did a great job with this preview, but I know you can do even better.