Excuse me for sounding like Ruby Gloom right now, but look at it this way:
1. Avatar ended with a bang.
2. As such, it will not be dragged out far too long like a lot of other animated shows these days.
3. When all else fails: Fandom Party!
Now if you'll pardon me, I have to get ready to cash my paycheck at the bank tomarrow. I'm throwing down some cash to make at least a Toph plushie.