- last post: 01.01.0001 12:00 AM PDT
Earth is likely to not be overrun by the covenant. The elites were as good as allied at the end of halo 2 with the humans. What's to say that, with the ark being a haven from halo, the elites and humans have agreed to shelter esach other, both from the flood and halo's weapons.
Also, it's possible that the covenant were fed the ideas of the great journey. from what we've heard, the covenant could well know what they're doing. When have you actually heard them say the weapon is not going to kill them all? the prophets may also be keeping the secrets from the lesser covenant, informed by by the forerunners of their duty once the flood go out of control.