Ok here’s where my head is kinda at with Avatar Grump AU in terms of like storyline:

So I think it’d take place at approximately the same timeline as ATLA, with tyrannical firelords and all that junk

Suzy, Arin, and Ross are best friends living in the fire nation and Suzy and Arin know that because of their bending they’ll most likely be drafted into the war and that’s kind of a huge no-no for them bc they’re really opposed to the war and anti-violent so they hatch a scheme with Ross to all three sneak out of the country via some wacky shenanigan Ross comes up with that’s so incredibly risky and stupid that it just might work out

That’s mostly all I have thought out so far but Barry joins their party after they save him from a group of fire nation soldiers (he doesn’t trust them at first which is understandable but Ross gets him to open up)

Then afterwards they somehow meet Dan & Brian idk how yet but yeah that’s what I got