There are many things in Avatar that we may not have even thought about. There are things that foreshadow other things. But what exactly are they? How do all of the many stories in Avatar connect to one another? It's up to the Avatards to figure that out.
Write the things that foreshadow what happens next in the show here and discuss about it!
Example:
In episode 101 (The Boy in the Iceberg), there is a beam of light that shoots into the sky right when they break out Aang. This light looks afully similar to the light that shoots out after Aang was about to take away Ozai's bending in the finale.