So as a few of you may have heard, Peria Chronicles will not appear in G-Star 2017....
But fear not my fellow Perians! According to this ThisIsGame article, Peria Chronicles is skipping the event to announce something more in Winter!
There isn't much more news on the subject, and we should be getting a lot more info between now and then. Although it says release, it's quite possible they may mean beta/etc.
The reasoning behind not appearing on G-STAR is because they felt that it would be too much of a burden to work on a demo and instead work towards a release very soon.
More news to come this winter! Stay tuned~