What Can Superhero Movies Learn from ATLA & TLOK?

What lessons could Aang teach Miles Morales? How might Korra relate to Tony Stark?

With the recent addition of Spider-Man: Into the Spider-verse to Netflix and having begun a rewatch of The Legend of Korra, I found myself noticing a large number of plot parallels between the acclaimed Avatar series and many of the superhero movies that have come out in the past decade or two…