343 industries is working on Halo 2 which has been a wish among the Halo Faithful. This edition will potentially possess the HD Graphics and the switching back to the previous graphics for nostalgia’s sake. Give 343 some grace with the release date which we won’t pin on the wall for now – I’d say September of 2014.[Source 1] [Source 2]
Update: Although we would love this to happen, the 343 team is to occupied with Halo 4.