For Kamikaze it was Avatar, Batman the Animated Series, G.I. Joe Renegades and Atlantis the lost empire.
Avatar: Story quality and good characterization. We also loved the worldbuilding and costuming!
Batman the Animated Series: THAT NOIR LOOK THO. A huge inspiration for our setting and background art. We also loved the iconic-ness of it, and wanted to get something similar.
G.I. Joe Renegades: This was strictly about swiping that more 'adult' look to the character design. We loved the thin lines, and hard angles. This also made us realize, "Okay, we really gotta make these eyes more proportional to the head if we wanna be taken seriously."
Atlantis: We loved the blocky nature of the work. The world building and the distinct and fun character personalities. Also the costuming and tech design that was cool but functional were huge inspirations.
So the team just kinda stuck it all in a blender for a year and created our style!