So far, though, we haven't gotten too much info on the main conflict of the series. I'm hoping they find a way to make it feel as epic as TLA. After you save the world from Fire Nation oppression after a 100-year war, fighting some anti-bending protesters seems a little lame.
Having a rising tide of people who want to put an end to bending seems pretty big to me. Like I said up-thread, it strikes me as a bigger threat to the world of Avatar than one nation going rogue. What remains to be seen is how well the show handles the issue.