Why the shift towards younger protagonists?
Not hating, and I still think the show can absolutely be amazing regardless of the characters age, but it does seem like an odd decision.
So far the series has followed a pretty good pattern. We all fell in love with avatar when we were kids and related to the characters who were the same age as us. Then when we became teens we got the legend of the Korra, which also helped us relate to the characters and their struggles, and now most of us are adults and we got the avatar movie where all the characters are adults and it was freaking amazing.
It seemed for a while the franchises characters were aging with the audience who first fell in love with them. I know most all my friends in my age group now are eager for a more darker adult version of avatar (maybe kyoshi in her prime?), and instead they make the new protagonists very young girls and possibly are looking to appeal to a broader if more younger potential fan base.
Again, nothing wrong with that. I’m happy to judge the show on its own merits when it comes out but it is moderately disappointing. I think this franchise has series potential for more darker/adult storytelling and I know im not alone on that. Plus the post apocalyptic setting seems perfectly fit for that type of mature storytelling.