This is not the first time I've seen this. The youtube channel named as Fabulous Joker, showing the gameplay of dragons in Dragon City, where those were not officially released, like in this video from today (October 10)
How does he gets access to dragons from event that not even started yet?
I watch a Q&A video from him telling that he is not a developer and do not work for SP, that he is just a normal and passionate player of Dragon City. So if this is true, how he can possibly have dragons not released?
Edit: per forum rules live links not permiteed.