I have 2 new gamemodes that should be a lot of fun in Halo 4.
Flood-fight- Team up with 3 other elites or spartans and try and contain the Flood outbreak. Goal: SURVIVAL
How to play: All spawned enemies are Flood, if they kill you, YOU too will join the ranks of the flood. End when all enemies are dead.
Flood-fection gamemode- survive the Flood Horde.
How to play: Like normal infection but infected have Flood skins and Flood loadouts (infection forum, Flood marine, Flood spartan, Flood elite, pure Flood). opposed to Flood-Fight, there are 16 players and all players are human controlled.
Flood infection form gameplay- press trigger button to infect a spartan/elite. Once you infect them, you have complete control over their body.