Lately, I have been considering ideas for the upcoming game "Halo: Reach". Since this game is still in development, as far as I know, I beleive now would be the best time to voice our opinions.
One idea holds its basis around expanded vehicle usage, such as the pelecan, phantom, and various specialty vehicles that expanded the destructive power of weapons and made their appearance the the fairly recent game "Halo Wars" (Vulture, HAWK, etc).
My second idea is forge related, in another game, "FarCry 2", a map editor was released that many beleive to be superior to the capabilities of Halo 3's Forge. Personally, I beleive that several of the capabilities from that map editor should be made for Halo : Reach. (Landscape editor, some stuff to make custom buildings, etc.
Anyway, feel free to post your opinions and critique my ideas.
[Edited on 06.20.2009 4:58 PM PDT]