It's made it's budget back, but Fox will no doubt be interfering in the follow up big time. I'll be surprised if Ridley directs again - he'll be producer of course, but I can see Nicolas Refn or even Matt Reeves sinking their teeth into this.
A:C isn't a poor film, it's just average with some intriguing moments. But if you really want to re-ignite the franchise, you need Ripley back for one last stand, one last battle against the xeno's...and the corporate suits!