This is intriguing. It doesn't really tells us what happens on Europa though does it? Could be aliens, could be metaphysical mumbo-jumbo ala 2001, could be a horror film like Apollo 18, or it could be a realistic depiction of a scientific expedition (wait, this is Hollywood, no chance of that). Anyway, excited but the execution is going to be an important factor. What are they trying to do with the story?
My money is on either a giant ice squid, mind controlling bacteria or some mysterious artefact.