To make the game better and not 'back in the past' don't 'take' anything from Halo Reach and just continue from halo 3
When halo 3 came out it was the same story line + weapons + more they just changed the maps and a new feature called "THE FORGE" a good idea so what I tell you is that I know a lot of people like myself (fans from HALO 1) would just like it if you would just add: new campain, game types, maps, armour(just new helmets and stuff) and a few other things. Do not add that stupid armour ability and that stuff. Basically forget that halo reach was made and you all are making thus game in 2009 September (2 years after halo 3) and you have to continue it, that's all.