Prometheus Ending

Thought this might be an interesting topic to hash out. I have my own ideas of what's going to happen, but would love to hear other people's theories as to what they think will happen at the end of this movie. How it will tie to "Alien" and if it leads into a rumored sequel we've heard about, what will happen to set that one up? From what I’ve been hearing the final act will venture into “Alien” territory which leads me to think that we will see how the Derelict ship arrives on LV-426 and provide closure as to what happens to the Space Jockey. I’m also thinking that they will have some survivors from this one continue on in a sequel. However, will the survivors meet up with new human characters or will they be stranded on an Alien world to struggle for their survival? I’m not sure, but I would have to think if they do a sequel, new characters will be introduced. What are your thoughts?