Another Batman story that I am including solely because of the back-up tale, this Sheldon Moldoff piece from Detective 301 (March 1962) sees Batman sealed in a plastic jar.
An accident at a factory making synthritc gems leaves Batman vibrantly coloured, and incapable of surviving in out air. He also emits deadly heat and radiation.
He starts fighting crime from a bubble craft with robotic arms, which is kind of fun for a few pages.
Eventually,in pursuit of some criminals, he winds up fried by a power line, which simply drains the deadly energy from him. And the colour. Although the colour fades more slowly than the power, allowing a final scene where the villains think he is still a danger to them, and give up.
J’onn returns to Mars in this story. A band of Martians attack Earth,stealing radium, and John is unable to change and go after them because Diane Meade is there. A scientist goes missing, and John tracks him, and the Martians, and realizes that the scientist has managed to rebuild Erdel’s teleportation machine.
J’onn follows them to Mars, and is re-united with his parents and little brother.
He has little time for reunions, though, as he winds up tracking the rogue Martians and renegade scientist, defeating them. The scientist gets injured during the fight, and winds up with no memory of his time on Mars.
J’onn bids his parents and brother farewell, and returns to Earth. Why he wants to return isn’t explained beyond bringing back the scientist, but I would theorize he grew to enjoy the time away from his family. We saw no other connections of his on Mars aside from them.