Dat Azula, Plus Sparky Sparky Boom boom man doe. And I'm pretty sure that was Roku's spirit dragon in the preview right :o?
The things I'm really Excited for '-'
Bumi Airbending
This person (Spirit Azula or Azula's son with Combustion Man o.O?)
Fire Lord Zuko
And Idk if I'm seeing it clearly I see like people using 2 types of Bending like the Guy Lava Bending o.O Either Way this is all exciting