I think it would be cool to add a new layer to infection gametypes. These are my thoughts. first off it would be a awesome to turn into the flood after being infected. i mean they are the closest things to zombies in halo. they dont have to be customizable or anything just when a player is killed by a zombie they turn into a flood zombie and others will see them as such. The next idea is music and sound effects. In forge they should give u a list of sounds and music (typically from all halo soundtracks) and u could have the the sound play when a player enters a certain area of the map or have the music play at a certain point in the game. It adds a sort of cinematic appeal when playing the game. Forgers like Isanmiac or others that create good maps but dont get enough credit because they are otherwise unknown will gain more noteriety among the halo community. computer AI that are doing a bunch crazy stuff would be cool too but i feel thats asking for too much in this case. How ever weather and time of day wouldnt be too bad. they are one of the most crucial atmospherical elements when creating an infection game. well thats really all i can think of off the top of my head.
I hope 343 will be able to read everyones ideas and take them into consideration.
extra ideas (forge):
-destroyed vehicals (option to be on fire)
-crashed pelicans and /or phantoms
if anyone has ideas all are welcome.