
In November, Scott was quoted as saying "It's written and budgeted and, frankly, we've already booked film stages in England, so I think [it will happen soon]." principle photography was said to be starting in February, but that's not known to be continuing as of yet.
Since the film has already seemed to begin production with a rumored set in Northern Africa, no one knows for sure what the exact dealy may be caused by. Alien 3 was also delayed in its release due to story development.