Well Alien 5 is not happening anymore. Neil Blomkamp has moved onto other things. He previously dumped artwork for the project online. Now concept artist Geoffroy Thoorens has recently re-uploaded some work he did for the project.
The canceled movie was originally supposed to replace Alien3 as a sequel to Aliens. The latest word on this franchise is that a television series based on the property will go into production. Frankly, the franchise is too lucrative and profitable to be kept on ice.