Ridley is still shooting Exodus... we'll only find anything for sure after that film is done.
EXODUS is finished shooting and is knee-deep in post. Scott has said outright that his next film is a 'sci-fi' but he was vague about whether that will be PROMETHEUS.
Jack Paglen finished the script - also reported by Scott - and his first script-to-screen TRANSCENDENCE, also a Sci-Fi/Thriller which landed him the PARADISE gig..., that film comes out in April.
If you ask me, that puts things right on track. FOX will no doubt be looking to see how TRANSCENDENCE - with it's Artificial Intelligence themes, will fair with viewers, and that info should line up with Scott's completing EXODUS...
Here's hoping TRANSCENDENCE is good.
Another thing to consider is Michael Fassbender's Oscar Nomination, as we can't be sure that his contractual obligation to PARADISE will be nullified by his potential paycheck increase and further demand on his schedule. Its been reported that Fassbender's schedule has been problematic... Yes?
Personally, I wouldn't be surprised if Scott produces, instead of directing, but I'm cool if he directs as well. He seemed legitimately excited to do so.