: ^This. The Forerunner element of Halo has sometimes felt to me like the least
: plausible element of the setting, and that doesn't help when nearly every
: plot about their artifacts involves the end of the world again. By
: contrast the Covenant's collapse often draws on our thoughts on the fall
: and changes of society in our own world, and fleshes out lots more new
: characters.

Well we've got plenty of Covenant and ex-Covenant characters and a gap of five years between the end of Halo 3 and Halo 4, so never say never that we won't get more there :)

There's also the fact that the ex-Covenant, for not relying on AI, might actually be in the best position to capitalize on Cortana's mayhem.