I think it could work. You might draw in some people with just the CM tag. But almost all of those people would want the Alien involved because that movie is what made them famous.
I think such things are better in a series format. I'd have a Colony focus, a Corporate focus, and a CM focus with the CM focusing early on human combat to show how such a force would operate, and then tying them all in together with the Alien for the last episode.
The CM would have to undergo a serious gear overall. Their tech is still better but better by decades, not centuries. I would love a carbine that I could shoot that wouldn't build up with carbon for me to have to clean later. That'd be every field soldiers wet dream.