obviously because it's not like Zuko is the only one who shoots normal flames. Actually I think Azula is the only one who doesn't, from what I see Ozai's is pretty normal so why does it HAVE to be Zuko attacking him? Why not Ozai and Azula? it's only common sense! They would never do that when he's already tried that move once in the season two finale.

and beside that we've seen zuko getting hurt and katara trying to reach him, why would he attack aang?

before: he couldnt attack aang before that happened because otherwise katara wouldnt help him

after: he wouldn't be st*pid enough to waint until he gets hurt to switch sides AGAIN

The thing to remember about Azula's more intense flames is that while they are more powerful than regular flames, they are also more difficult to create. While Zuko likes to go in for long lasting, great gusts of flame that he can maintain for a while, Azula prefers short, concentrated bursts of more powerful flame. A great example of this is the fireball she built up to attack Aang with in CoD when Aang was encase in the crystal armour. Her fireball was at best only about a tenth of the size of the enormous fire blast Zuko produced a few minutes prior, but it was just as, if not more, powerful.

Personally, I think Ozai can do white flames, and they were the flames that we saw him throwin the trailer. The reason that a lot of people have been mistaking them as regular flames is because of the coating of orange flame around the outside. We have in fact seen two examples of this type of "white fire" previously. The first was in "The Firebending Masters", when the dragons breathe fire around Aang and Zuko. If you look closely, you can see streaks of white moving through the orange fame. Then there is the trailer for the second half of season three (the NYCC one). The huge fireball that we saw Aang block by throwing up a wall of rock may have had some orange around the outside, but the center of it and the place where it impacted on the rock were pure white.

I hate to be a nag, but no. Blue flame is the next hottest after orange (as can be observed by looking at a lit match). White fire is as hot as you can get, hence the expression white-hot.

yea white fire is the hottest

yall ever looked at a gas top stove flame its starts blue then orange and the white flame at the top

Not to be a bother but where does he shoot green lightning? I'm looking through the trailer again and again but the only lightning I see is the lightning that Zuko redirects from DOBS which is kinds stupid considering it's a trailer for a movie ten episodes later. And where is he bending white fire? I see some wicked giant blasts of normal but not white. Am I just blonder than I look?