Zuko tells the gaang about the "boiling rock" and how there most of the "main prisoners" are taken-
Sokka than thinks "maybe Suki is there-
he tries to sneak off, as he "dresses yet again as a fire nation citizen" but Zuko sees him, and goes behind him trying to talk him out of it. but Sokka convinces him to join him and go there
there Sokka finds Suki, and are able to start a riot
Azula, Mai and Ty lee go there as Azula wants to see "her favorite prisoner" and find that the riot started, and they join the fight
Mai and Azula fight sokka and zuko while Suki fights Ty lee "End of BR 314"
I think Sokka is somehow able to escape, "Maybe Suki too", but the FN angels are able to get Zuko; and on BR 315 Mai talks to Zuko(the panel shown in SDCC); Sokka gets back to WAT, and the whole gaang comes back to rescue Zuko, but mysteriously when they get there, Zuko has already being able to escape, and the gaang gets out from BR
"END of BR 315"
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something to consider thinking along lines of "how can we keep the Zutara-kataang" thing going
I will make it that we see that Zuko has mysteriously escaped after he was talking to Mai, and she "seemingly" was talking harshly to him while Azula was with her, and Mai "said" she was mad at him for becoming a traitor we will be wondering, "did she really break up with Zuko? did she helped secretly Zuko to escape?"
Zutarians will say "See, they are broken up, gates are open for Kat to be with Zuko" while kataangers will say "Mai helped Zuko escaped, she only pretended to be mad at him, by the finale we will see them back together"
if they showed Mai helping Zuko openly, and "worse"(for some) she joining the gaang, it would close the Zutara-kataang just like they don't want to show Aang and Katara talking about the kiss, as that would either confirm Kataang, or kill it and make Zutara stronger