Neomorph/Protomorph

Depends if the script dumbs the creatures down to mindless animals, or pays tribute to the original alien and makes them calculating and sadistic.

If they turn out animalistic, then they could be territorial and confront one another -- heck imagine a scene like the end of Jurassic Park (except its two 'neos' versus one 'proto').

On the other hand, if they are given some intellectual capacity, then the (at least) three aliens could scheme together cunning traps and utilitarian-esque conundra: e.g. forcing the humans to choose who to sacrifice in order to save the rest -- toying with the humans to fuel their sadism.

who knows....

I think they would be holding back a bit on what we are shown...

So far yes... seems we have TWO Neomorphs (if thats the right words) from the Spores.... and at Least ONE Xeno related Organism from the Egg/Face Hugger.

The cast spoke about being chased by multiple Aliens which also include on the ship (Covenant) so its safe to assume the Neomorphs and Xeno get on the ship... or there is more than one of those on the ship... but who knows.