Deity World is now live for at least some iOS users. Make sure to update your app to the Dec 5 version and you may see the portal at the 10 o’clock position of the first island.
There was a push notification on Android from the Dragon City app which says a big change is coming Thursday. So that’s likely when Deity World will be rolled out on Android.
Do you have an iOS device that has Deity World? Looking for more confirmation that it is in fact live. I can’t see it yet on my iPhone 5.
UPDATE: The Ancient Portal is confirmed as live on iOS and Android, but is not yet functional for most players.