It's all a bunch of misdirection. That's the one thing about ridley I never cared for. Either he's always drunk as a skunk, crazy as a lab rat, or he is the king of misdirection and misinformation. Everytime he talks he contradicts what he said in the previous interview. It's ridiculous. I've given up watching his interviews and pretty well come to the conclusion that if he is at the helm I'll just have to wait to see what it's about. Because I sure as hell ain't gonna find out the details from his interviews.
I can understand why you feel this way. There were two things going on during the rounds fro PROMETHEUS which caused this. First, Ridley is not the most articulate guy. Its taken me a while to get used to his vernacular. This whole 'connection to Ripley' business is an example of the problem with it. He means to say, events in this film link up with Ripley's story somehow. He says he is 'coming at her story through the backdoor.' The man speaks in metaphors. He is vague by default, but this is likely a testament to his creativity.
Second, when Prometheus was about to shoot, they were designing, building sets and even the cast was working from the Spaihts script and Damon Lindelof's rewrite had to work within the parameters of already having a great deal of Preproduction and set building and Production Design already finished, so the info being reported was in flux as it was being asked about by the press. It created confusion.
I think, they realized what trouble this caused. Because they had the script finished long before. They also had the rewrites done, long before they started designing anything.
Also from the gist of what he is describing, Paradise Lost tie-ins and all, I think I finally understand much of what was happening in Prometheus, so it will begin righting wrongs, I believe.