Jack West

Another theory on Amon.
In episode 4 there is a a flash back where we see the characters from the past series as adults.
What if Amon is the mystery man from the flashback, he hates benders because Aang took away his bending. Since then he has been trying to find a way to remove others bending. He has not found a way as powerful as Aang’s instead he is able to block their chi in a way that appears to be permanent.  The connection between Amon and the flashback could be due to the fact that Korra possesses all of Aang’s memories and Amon could have triggered one of them when he hit her. 
Also, Amon’s story is eerily similar to Mako’s ever notice that? It is totally unrelated because his ability to bend would have been taken away by that point but it is interesting.

If you want to read more crazy theories check out my theory on how Amon could be Tenzin.  http://jack-west.tumblr.com/post/22003161663 

Note: I am not saying that Amon is Tenzin, those are just some reasons why it could be a possibility.

Another theory on Amon.
In episode 4 there is a a flash back where we see the characters from the past series as adults.
What if Amon is the mystery man from the flashback, he hates benders because Aang took away his bending. Since then he has been trying to find a way to remove others bending. He has not found a way as powerful as Aang’s instead he is able to block their chi in a way that appears to be permanent. The reason there could be a connection to Amon and this mystery man is because she possesses Aang’s memories and when Amon hit her it could have triggered one of them.
Also, Amon’s story is eerily similar to Mako’s ever notice that? It is totally unrelated because his ability to bend would have been taken away by that point but it is interesting.

If you want to read more crazy theories check out my theory on how Amon could be Tenzin. http://jack-west.tumblr.com/post/22003161663
Note not saying he is Tenzin just that it would be a cool plot twist and there are some facts to make it possible, just not likely. 

Here is a list of a few things that could indicate why Tenzin could be Amon:

• Tenzin is never there when Amon is.
• Amon can dodge lightning, lightning is REALLY fast you would have to super fast or like and Air bender or something.
• Amon’s voice keeps changing so that is no reason to rule it out.
• Aang could have taught him how to remove bending.
• Amon claimed that he talks to the spirits. “Tenzin is Mr. Spiritual”
• Tarrlock is a pretty obvious choice and wouldn’t be that great of a twist.
• Tenzin is a council member so he would be able to monitor both sides.
• Amon has only taken bending away from criminals so far.

 Now, you say what would his motive be? Well, Tenzin is pretty wise. He could have seen that there was a growing divide between non benders and benders. His wife is one of those examples; she wants their next child to be a non bender. In order to assure that there will truly be peace between the two group they must resolve their differences. So, Tenzin has created a rebellion with which he could expose both sides views, and even though there will be some very serious conflict if the people of the world deserve peace they will be able to accomplish it. Remember, War is Peace.

Amon is really Tenzin.