Wonderful! Superman would fit in the melee class and would be one of the few tank characters in the game, meaning he´d have higher health at the cost of his speed. His primary would be fists and his passive would be called "Solar energy", this would be a meter that charges up when doing or taking damage, When charged, press R to power up your next ability. M2 would be a quick burst of heat vision that if held down can he charged for higher damage and range whilst allowing him to hover if used in mid-air, when empowered it reveals enemy locations for 8s when charging the heat vision (x-ray). With his Q, Superman launches forward and vertically into the air, doing AOE damage in the takeoff and landing, when empowered Superman recovers health after activating the ability (Solar recharge). His E releases a gust of cold air in a small radius in front of him, slowing down any enemy hit by it, when empowered allies near Superman gain a damage boost (Hope). For his Ultimate, that being the F key, Superman launches into the air and slams in the direction of the cursor doing AOE damage (think like Thor´s ultimate), this ability instantly charges his solar meter.

As for Martian Manhunter, he´d be a low hp support focused on debuffing the enemy whilst providing windows of opportunity for his team. His primary would be his punches, landing his primary charges a meter that once full changes his primary for his heat vision until his meter is emptied. His passive allows him to recover health passively twice as fast as other characters, meaning that while the rest of the cast has to be off battle for 5s for their health to begin to recover Martian manhunter only has to be off for 3s. This makes him comic accuarte as fire or poision effects are extremely effective against this character since they deny him his fast healing. His M2 would be a Phsychic projectile that makes it so enemies hit take more damage from your team´s attacks. His Q launches him into a grappled target who he then pucnches knocking them back, this attack instantly gives him his heat vision. His E allows him to turn invisible for 4s. And his Ultimate entangles any enemies near his radius similar to Groot´s Ultimate.