I know there are fans who will be pleased by this, but it just smacks of laziness to me. Fox and the filmmakers don't want to lie in the bed they made, won't reboot (although I guess Prometheus is somewhat of a reboot, making the AVP films non existent), and can't use a time travel plot device to start over, like Star Trek or X-Men: Days Of Future Past.
Know what the last film made that ignored it's previous two sequels like they never happened? - Superman Returns.
Plus bringing back not just Sigourney Weaver but Michael Biehn, it seems like excessive fan service.
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"I'm not smart so much as I am not dumb." - Harlan Ellison
"The Daemon lied with every breath. It could not help itself but to deceive and dismay, to riddle and ruin. The more we conversed, the closer I drew to one singularly ineluctable fact: I would gain no wisdom here."