Space Jockey communications with Prometheus Crew

The other thread wondering if the deleted scene warning signal in ALIEN is the space jockey voice got me wondering... How do you think the Space Jockeys and/or Engineers will communicate with the crew of Prometheus? Some possibilities I can think of are: They will speak in English-- (we have studied your transmissions and learned your method of communication). The voice might be digitally altered to make it unique, but still understandable. They will speak through David--Possibly some digital format that data can decode and relay to the human crew members. They will speak telepathically--Could be in the form of an inner voice, or through some sort of vision. This could be cumbersome to the movie if there is a lot of communication. Also the possibility of Empathic communication. The crew doesn't communicate in the typical sense, but instead the beings project feeling/intent at the crew. Example would be love (if they are good), or Malevolence. Any thoughts?