Brikar, you're right. It was just 12 episodes originally, but it's changed since then.
Yup, up to 26 episodes now, last I heard
Interesting the first batch/season will be called Book One: Air, following the Avatar: The Last Airbender format, I wasn't expecting that.
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?