Without these aliens in Halo 4, is it even a Halo game?
I mean lots of fans love battling the covenant, and lots of people would be fine if they weren’t called covenant.
For example the Elites allied with the UNSC, and are on a mission to kill the prophets and brutes as well as any other “covenant” the still serve the prophets.
If you read the book or even watched the video “The return” you would see there are still are jackals and grunts and brutes roaming the galaxy, still trying to destroy humans, and the remaining elites, now allies with the UNSC, are hunting these “covenant” remains.
This doesn’t mean you wouldn’t be fighting forerunners and the flood in halo 4, but if there is a few missions were you meet up with some elites and hunt some brutes I think a lot of people will be happy.
Also the gameplay would be terrible without some forms of covenant.
Like how would you play firefight? Wave after wave of monitors? And Invasion? Let alone what about preferred species? Spartan or flood?
All I’m saying is if there is a little covenant survivors here and there, it would still have the right to be called Halo.