firstly, to make things easier, please label your post whether it is a Comment??or a Speculation.
secondly
speculation
1. i reckon that angs firebending teacher will be itohs grandson. son of an inhabitant of ba sing se when he broke through the wall (lets call her shari) and of lu ten (sp) (irohs son). luten falls in love with shari and visa??versa??and dies, leaving her pregnant. shari tells her son (lets call him rhan) that he is son of a firebender when he is old enough to understand. from that day he learns firebending from the scrolls he can steal offblackmarket dealers. when aang was released from the iceburg, avatar roku came to him and told him that he would be the one to teach aang firebending. the great thing with this is that since iroh and zuko are traitors of the firenation, all that has to be done is to take down the firelord ozi??and azula and he is heir to the throne.
2. when the southern air temple was attacked by firebenders, the airbenders sent out many lemurs with parchments warning the other airtemples. the firenation took down all but one which flew to the eastern airtemple. they sent a messenger to the northern air temple but when he got there the invasion had already began. when the eastern airtemple learned of this, they knew that they were next. they evacuated most of the population of the temple the western airtemple! hidden in an underground, underwater pocket of air, it is a true oasis. it is full of trees to renew the oxygen and is lit by crystals, similar to the ones in the cave of two lovers but much brighter and they cycle through day and night. it is only accessable by making a tunnel of air through the water you could make a water bending tunnel but there is no way of getting down without a sky bisen. you could also make a earthbending tunnel from the mainland but the western air temple is on its own tectonic plate and surrounded by slightly molten, boiling hot rock.Edited 2 total times.