When all contact is lost with a colony on a distant planet, a space pilot who claims to have discovered a terrifying creature there must join a team of bull-headed marines to investigate.

Re: the logline itself:

Since Ripley is the protagonist, the inciting incident could/should be framed around her. The fact they’ve lost contact with the colony is key, but I think it needs to be from Ripley’s perspective. There’s some leg-work to do here too unfortunately. As a sequel though, you can use a bits of the first to help. You’re working with an existing IP – capitalise on that! Use “Ripley” rather than space pilot (but maybe give her a characteristic), tell us that this distant planet is the same one the Xenomorph was found in Alien. It’s a very different beast working with sequels. My biggest question from yours is “why?”. Why MUST the space pilot join them?

I feel like your logline only goes to the midpoint – nothing wrong with this – but the midpoint is the discovery the colony has been completely overrun by Xenomorphs and now the film shifts to be about survival… That’s a big shift and it tells the reader a lot about what sort of film this is. Especially if you can plant the seed that it’s about two “mothers” protecting their “young”.

Food for thought anyway. Hope this helps.