Post in the comments if you've found some leaked info or other things that we might not know. ;)

Here is what we currently know:

  • Skrills will appear!
  • Alvin will name his new dragon.
  • More on Hiccup's mother will be revealed.
  • Astrid's family may or will appear.
  • Gobber may get his own dragon! (Unconfirmed)
  • The season premiere will aire in September!

Spark said: The real Isle Of Night may appear.