OK, this is how my theory is for what is going to happen to zuko.

Azula
propossed to help zuko get aang so he will have his honor back, and
sence thats like the only thing he really cared about, he took it.
Sence aang got away (with a hole in his back, by the way.) zuko still
felt like he had failed in capturing the avatar. thats why he was
talking to azula about still not having the avatar. Azula made him feel
good by telling him that everything will be fine and that he will have
his honor back.

NOW! I think that Azula and Zuko are going to go
back to the fire nation, probaly to tell the fire lord they have
control of Ba sing sa. I bet that they will bring uncle along as a
prisoner and i bet that uncle will try to knock some sence into zuko
but will fail. Now when they get to the fire nation and when zuko will
think everything is going great for him, Azula will stab him in the
back by saying that she had completed her task as to capturing Zuko and
Iroh.

Zuko will somehow escape (uncle wont), I dont know how but
will, and will end up running into aang and the gang and then they will
be all mad at him, kick his butt a little, Zuko will say he can teach
aang fire bending, katara will fall for him, sokka will be ready to
kill him at any second if he does something suspisous, and all will go
well. And aang defeats the fire lord.

tell me what you think of it

sounds like it but im betting one further twist is iroh will be killed and azula will take over as fire lord

yea i agree, after all only SHE and her girls know about the eclipse* picturing her telling Tae Li to block OZAI's CHE*

I think it's a good theory, but i don't want iroh to die.

Did you guys know that the voice of Iroh passed away after voicing this episode!? i was SOOO sad! he was my fav character...*sigh*

I also agree with your theory and def. the fact that Katara will fall for Zuko...hence aang will elt her go= avatar state, ect... it will be cute, but im so angry at zuko right now, and i really wanted his scar to heal!!! ahhh!

the throne belongs to iroh so i dont know where you are getting your zuko will take over or azula will, if ang beats the fire lord and iroh is still around then zuko if he's still alive will let everyone know that iroh is the real firelord not ozai.

Watch the last Zuko scene in Crossroads...it pretty much laid out whats going down

Zuko is gonna get welcomed back like a hero but still feel conflicted about his role in the world....but Iroh will go on trial or something

eventually he'll find out some secret about his mom or Iroh that will make him turn on Ozai and become the Firelord

or that whole Double Cross could turn out to be a trick to take down Ozai too....the basically did that to Zhao last year