All Bungie has to do is say "some of the devil splicers went to Venus to experiment with vex technology" to justify SIVA being there. That's what I meant by it can be anywhere. What I meant by early access is that Playstation players can play the strike now, but it's possible that the events within the strike take place after the modified Nexus is destroyed. Think of the upcoming strike as a prequel that was released after the restorative mind in real life, but takes place before the events you've already experienced.