There is a similar Avatar themed Olympians thread Denji san (Or Captain Planet themed if you know that )
You can also look at the 5 elements in Chinese mythology. (Wood, Metal, Fire etc.)
If you want to be completely different, you can go with a villain-themed group like
Team Pain (Naruto)
Team Aizen (Bleach)
Team Father (FMA)
Team Betelguese (Re:Zero)
Team All For One (BNHA)
(Or Captain Planet themed if you know that 
)
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