Things are in the "actively pushing ahead" stage (Their words; not mine) for a sequel to Ridley Scott's Prometheus, per THR.
Were a follow-up to the Alien prequel to happen, it would be without the contribution of screenwriter Damon Lindelof. Deals for Noomi Rapace and Michael Fassbender are in place however. In other words, the pair and most likely their dead co-stars, had sequel clauses in their contracts.
One of those "Maybe the studio and filmmakers will kinda, sorta, if everything comes together but we're not sure do that sequel!" stories. Reads more like speculation, and since Prometheus didn't have big financial returns nor was it received overwhelmingly critically-speaking, this rubs me as non-news. Don't set your calendars, or hopes, just yet.