Hold on tight, folks. 343 have announced that the Flood will be returning in Halo 4, although it looks like the parasitic miscreants will only be featuring in the game's multiplayer.
Frank O'Connor confirmed today that they'll be the stars of a multiplayer mode called "Flood", which is basically Infection but with pollinated mutants instead off zombies.
There are also two new vehicles that 343 announced for the game today, with the Mammoth troop carrier ferrying soldiers to and fro, and an enormous badass mech that you'll be able to climb into and from which a wreak destruction with some rockets and cannonfire. Mmmmm....mechs.
And is that Kelly-087 in one of the screenshots?
We'll have more for you after going hands-on with the multiplayer later today.