that would be pretty cool, i mean, they have FXs in Halo 3 but those just screw up your vision, they dont do anything useful, no one uses them, and if they do then people will hate your map. Instead they should be wether conditions, not "pen and ink"
alos, they need a flashback mappack (like from gears) only there should be a reamke of bloodgulch/coagulation, beaver creak/battle creak, Chiron (CE map with all those crazy teleporters) and boarding action. Why bungie, WHY DID YOU TAKE AWAY BOARDING ACTION!?!? (sob)