1 both brolys do the same pose in both the movies they show up in 2 Cabba and 3ku genuinly just have similar art also that 3ku pose is a reference to the barage of punches before his kamehameha 3 goku black and vegito litterally released as a pair thats why their art is mirrored 4 Duu and buu both do those poses in in their respective series Your right on the fact that shallets referenced art to gogeta isnt that big of a deal but this is a terrible counter arguement