i dont mind there being changes to the look of the covenant. each game changes a few things astetically. sleeker armor better teeth, new animations.
but not entirely new character design, i believe in halo 4 the elites, grunts and jackals must be a different species or sub species.
and what i hope and from what i see in the halo 2 eh halo 5 terminals the arbiters elites looked normal. so maybe the old covenent races and storm races can both be in halo 5.
ill use the elites for an example.
before halo;ce vs halo 2
-in halo 2 the helmet showed more of their mouth
-their armor wasn’t as metalic
-their thighs and feet are more covered
-their jaws and hands are more reolistic
-and their color sceme included purples and teal instead of all blue
BUT over all they were nearly the samegraphically updated
halo 2 - halo 3
the armor changed to be more intricate but the elite just got beefy
reach changed their body a little
updated/ life like mouths
mid leg joint more flexable/defined *above foot / under knee cap
jackals used to look bird like but now more like reptiles