Batman (Nananananaananana BATMAN!!"
HP - 80
Atk - 105
Def - 90
SpA - 100
SpD - 90
Spe - 65
BST - 530
530 BST isn't much to spread over Batman. 80/90/90 is good enough to reflect his above human durability, with and without his suit. Because of his versatility, 105 Attack and 100 SpA makes him great as a mixed attacker, and also representing his Striking Power and Gadget Use. Finally, Batman has human-Peak human speed, which honestly isn't much, but research reveals that Bats moves greater in specialized areas. Conveniently, the 65 speed makes him better under Trick Room.
(More coming but can we have an alternate Bats form, like Genesis God Batman or Parallax Batman?)
SUPERMAN (Is it a bird? No, it's a plane! No, it's Trash Dove)
HP - 90
Atk - 130
Def - 80
SpA - 100
SpD -85
Spe - 95
BST - 580
There, Superman is a darn Kryptonian, so 90/80/85 compliments his Super-ness in tanking hits. Although not much, his defenses lets him live a few hits and hit hard, which brings us to his showcase. His 130 Attack reflects the fact that HE BENCHPRESSED AN EARTH-SIZED PLANET FOR 5 DAYS STRAIGHT. 100 SpA gives his heat vision, freeze breath, AND POWER SNEEZE power. His speed is just between the Uber hotspot, outspeeding about half the meta.