What if...Korra accidentally gave bending to a non-bender.
If that happened she would likely be swamped with non-benders and Equalists alike. Average people wanting bending that she can't give it to ("You're hoarding bending so you'll remain in power!") and Equalists wanting to stop her ("You'll get rid of all non-benders! We'll become extinct!"). Both - "Amon was right!".
Just a thought.
Cross-posted from Dreamwidth ( http://nimitzbrood.dreamwidth.org/260505.html ) but feel free to comment here as well.