I don't think. Amon.. has passed.
Really,we need think more wise,he cried on last second if I am not wrong... maybe he survived,and knew his brother was going to do something.
And next season need explain much things..like other nations,spiritual travels..avatar stage (at last the control of it),more air bending.And Korra need give back a lot of bendings..
People will eventually love me :3