I have a feeling any map remade in Reach will be horribly butchered by the game’s mechanics. Not only the mechanics, however, but also the fact that Bungie won’t be making them (Bungie was always good, IMO, at reimagining their own maps; I don’t trust anybody else to do anything but originals).
That said, I’d like to see these FOR SURE: The Pit, Valhalla, Avalanche, Lockout (IMPORTANT: Original Lockout; vibe and all… No reimaginations, nothing. Just pure Lockout. Snow and all), Guardian.
And it would be nice, but not necessary, to see: Battle Creek, Chill Out, Citadel, Construct, Narrows
This would be, of course, after they fix their current remakes of Ascension and Sanctuary to make them more faithful. The Banshee and Overshield were a large part of Ascension… 1/3rd of the map is missing without it. Sanctuary is missing one whole side of the cliff and some minor details that made a big difference.
As far as Firefight, I’d like to see Windward, Lost Platoon, and Security Zone. I’d admittedly like to see more originals for Firefight.