i have a theory about the person who wil teach Aang firebending. please tell me what you think & if you agree/disagree!
my theory
you remember the sage from winter sollice part 1-the person who helped Aang, Katara, & Sokka in the fire timple when Aang wanted to meet Avatar Roku??? well he was a firebender-a master, i believe. But, you dont know if he escaped from General Zhao., even though he imprisoned all the sages. So, maybe he might come back & teach Aang fire bending.
does it make sense? please reply yer thoughts!!