Y'know this made me think of the re-release of Startrek the Original Series. when it began the studios just made straight minor cgi upgrades to all the special effects and model shots but gradually (perhaps due to fan pressure) they began replacing the origianl model futage with more modern special effects adding scenes that differ greatly from the original, it wouldnt nessecarilly be a bad thing in the case of a halo 2 remake (considering it sort of is an unfinished game) but then again, George Lucas has shown how this can be taken too far.
Yes he did. I still regret buying the Old Trilogy with new effects. There are pink explosions everywhere, it's awful.