Not asking why it's again another of alliance of aliens we're fighting. I'm more-so wondering why they /are/ seemingly in an alliance. For all I know humanity could have terrible luck, and these guys all came along at once. The Cabal and the Fallen I could see teaming up. But the Vex and Space Zombies don't seem to match up too well. I mean we know what they are to an extent, and it's why they kind of all seem painted in different lights to me. The space zombies /could/ be deployed by the Cabal or Fallen, but that still leaves the Vex in a pretty mysterious light. What do you guys think about this?