I'd like it if we could mix.
Some can camoflage and some can transform into humans.
Not all of them necessarily need to be hunters.

I also think the hunting would be better suited for grunts/monster of the week. Not the generals and lords.

also, we don't need to go that far.
this isn't Garo.

What will the grunts/mosters be based on?

someone said that they can be made from objects or other fossils.
so that would work.

but what are the various powers the Extinct would have?

If they are made from Objects that got mixed with Fossils they could be like the Dopants and have various powers that are connected to the objects they were made from.

How about making the grunts based on ammonites & trilobites?

How about prehistoric Insects?
Google it and see what i mean.

there can be a lot.

we don't have to limit to just 1.

I was thinking of a mutant fossil dinosaur theme to it.

They can be based off of any dinosaur really, but it's going to be a fossil monster.

Grunts can be based off of anything you'd like, it would just be a visual effect as their abilities would all be the same.

The problem would be from your monster-of-the-week and executives. If you choose to base it off some really esoteric theme like prehistoric insects of which there isn't as much info to find and the audience couldn't differentiate between, then it would be more difficult designing unique complementary powers for each of them.

considering we're probably not gonna make a series out of this, we can probably cut the monsters of the week and focus on generals.

like, if we really want, we can come up with a few or some monsters that would depict where the plot is.