My thesis on enemies as part of gameplay and story in Halo 4.
TL,DL: Why you can expect covenant races in Halo 4.
First of all I want to address the statement from 343; “No purple” -Obviously this refers to the series primary enemy faction: The Covenant. (Read: No “The Covenant” in Halo 4).
This does not mean we wont see any of the individual species that belong to (or have belonged to) said faction.
In other words, it is the faction, and not the perpetrators, that has crumbled and perished. The various kinds of alien races found in the covenant, still flourish on their homeworlds and have their respective motifs / conflicts. -Except for the prophets, who are now in danger of extinction.
There will be alliances, and you can bet your sorry behind that there will be wars.
-And thats just story-wise…
The second (and probably the biggest) reason why 343 industries cant take away these various types of enemies, is because of Gameplay.
In 2012, all eyes will turn to 343 industries, who have taken the huge responsibility of forwarding the legacy of halo. They will seek the approval of the community, and they better not screw it up. So although they will make changes and add features, the product they deliver must be a reflection of the previous installments.
If you take away the chicken in a chicken-salad, it is not a chicken-salad anymore!
Halo has been a groundbreaking series since day one. It is the flagship of the Xbox consoles and it has made videogame-history by defining and reinventing the first person shooter genre for a decade.
You just don´t screw with that.
The gameplay of the campaign part of the Halo series, has always had a unique feel to it. In other, simpler shooters, you see one type of enemy, and two-three types of weapons, but halo puts all that to shame.
The Halo series offers several different types of antagonists, and a multitude of very different tools you can use to defeat them, in a semi-open-world environment. This creates what game-developers refer to as a “sandbox”, allowing the player to choose different paths, strategies and techniques. The Halo gameplay-formula also generates what we call “replay-value” because you can play the game multiple times and still experience something new.
Essentially this formula is a giant “rock-paper-scissors” scheme. (plasma pistol beats shield, shield protects from bullets, bullets kill grunt, etc…) And you can take away certain parts of the scheme, like removing some enemy types, or replacing a weapon or two; BUT you cant just scrap the entire system. Removing the entire covenant = Scrapping the whole system.
Thats like playing a game of “rock-rock-rock” because “paper” is dead and “scissors” is retreating…
This leads me to what is probably going to be your best argument: What about the "ancient evil" and the rumored human vs. human tribal wars on the rumored shield world sigma 07? Cant they just replace the old enemies with humans and that one new enemy?
-Well, first of all, regarding humans, either UNSC, Rebel, or ONI, I strongly doubt that. This because the halo series has kept away from violence against humans entirely, as a moral standpoint and in order to get a certain age-rating by PEGI.
Then comes the question about the now confirmed new “ancient evil” enemy. What is it, what does it want, how will it appear? (Spoilers) There is in fact one such “ancient evil” known in the halo universe, the precursors, more precisely the precursor “the timeless one” whom is thought to be the only one left.
Precursors are supposedly 15 meters tall and bear weapons forged from neurologically networked metal and their technology is more advanced than that of the forerunners. Even if it turns out that there are loads of them instead of just one, its going to be really difficult to make them function practically in-game.
(/spoilers)
But lets be pessimistic, lets say there are tons of them and they are in Halo 4, and that there are human enemies.
You are now fighting a nice mix of bewildered / insane marines, Flood, Robots, and thousands of giant, immortal, evil and impossibly advanced, time-traveling space-lobsters.
Fun, perhaps, but its not going to be Halo. And Halo is what it is.