Versus Threads are a commonly occurring type of thread on The Flood. Often, they're based around a standard text post or a Poll. Most of the time they end in flame wars where either sides resort to entrenching themselves and slandering the others for being ignorant, or fanboyish.
Common subjects to be compared in these threads include Batman, Master Chief, Star Wars lore, Iron Man, and Spartans (Ancient Greece.) These topics are chosen commonly based off of the special place they hold in the hearts of many Floodians.
One of the more famous ones involved Master Chief John-117 and Bruce Wayne, aka Batman.