Man, that's a really good question. I had to think about it. The Talent Hunt PDF says this:
**This round your submission must be set in the futuristic timeline/world established in Aphrodite IX, Cyber Force and IXth Generation and can feature any character included in any of those three titles in any time from present day to the 2827 AD timeline of IXth Generation. If your story conflicts with published continuity it will be automatically rejected.
Cyber Force Rebirth issue #1 opens with, "Millennium City, Pennsylvania. Today." So, I would take that to mean that anything from there through the IX Generation series is where your story needs to take place. Correct me if I'm wrong, anybody.