Base on this prompt:
Batman had been suspicious of Cadmus for a while, so on a slow day, he and Superman decide to finally investigate.
Where they find the Superboy and take him to the hall of justice.
But unfortunately, Superman still reacts like he did in canon and without the team forming, the young Superboy needs a guardian.
To everyone's surprise, Captain Marvel enthusiastically volunteers to take him in.
After all, Captain Marvel thinks who knows better of how a kid with superpowers feels than another kid with superpowers! Besides, he's totally responsible enough to try his hand at that mentor thing that all the adults are doing! Not to mention it'd be awesome to finally have a friend he can talk about this with (other than his uncle Dudley) even if he's a little new and naive.
" talking"
" Singing "
"thinking"
It was a few hours ago when Batman and Superman returned from their newest mission, with a baby. Apparently , the said baby was Project Kr, AKA: Superman's clone. Batman had suggested that Superman should take care of the child while Superman refused . Saying that the clone could be evil.
"He's just a baby Clark."
"I'm not his father! And he's a clone!"
The whole league was so focused on the Dark Knight and Man of Steel 's argument, that they forgot about the small child who had woke up of the shouting match . And was now crying from his baby pop-up tent. All except one.
Captain Marvel slowly approached the tent. Even with the wisdom of Solomon, he was still unsure of what do. Hesitantly , he reaches for the crying boy and gently picked up the child. Using the vague memories of a lady calming her baby that he saw one day while walking to school, he began to amble around the room while lightly bouncing the baby . After a while, the boy stopped crying and started to look up to Captain Marvel with his bright blue eyes. He held look, before letting out a yawn.
"So you're tired, eh?" Captain Marvel asked softly . Giving the small boy a smile, he began to sing.
"If you be my star I'll be your sky
You can hide underneath me and come out at night
When I turn jet black and you show off your light
I live to let you shine
I live to let you shine"
Captain Marvel was, by no mean, a good singer. Neither is his true form, Billy. But it didn't stop him from sing this song whenever he misses his departed family. After all, his mom used to sing this song to him and his sister, Mary, back when she alive.
"But you can skyrocket away from me
And never come back if you find another galaxy
Far from here with more room to fly
Just leave me your stardust to remember you by"
But he was lucky enough to had parents. Not to mention now he has Uncle Dudley at home too. But this boy, he doesn't have any parents, at least not with the way Superman is acting, and he also doesn't have a name.
"If you be my boat I'll be your sea
A depth of pure blue just to probe curiosity
Ebbing and flowing and pushed by a breeze"
Batman was the first to notice the singing, suddenly stopped his shouting in mid-sentence before he shifted his attention toward Captain Marvel. Superman noticing the other man sudden pause ceased his shouting, and then he too shifted his attention to the singing Captain.
"I live to make you free
I live to make you free"
By now the rest of the leaguers had picked up on the song that was gently sung by their usually childlike member. Who was completely unaware of the eyes that were watching him putting the young child to sleep.
"But you can set sail to the west if you want to
And past the horizon, till I can't even see you
Far from here where the beaches are wide
Just leave me your wake to remember you by"
Captain Marvel gradually ended his singing as the child in his arm slowly fall asleep. As lightly as possible, Captain Marvel laid the boy back into his pop-up tent.
Giving himself a mental pat on the back, the Captain turned around and was planning to head home to get some well-deserved rest ( and maybe grab some baby toys too), only found the rest of the justice leaguers staring at him
"Uhh, can guys please be quiet? Don't think the baby likes loud noise," he whispered, hoping that would stop the rest of leaguers from staring at him.
Wonder Woman was the first one to spoke up, breaking the silence in the room "It seems like we have found our solution to the problem. "
-(Time Skip)-
"...and now the league is ready to put the baby in my care" Billy, still in his Captain Marvel form, finished explainning the situation to Uncle Dudley through the phone that Batman had lent him.
"Batman said he is willing to pay for the expenses. " He was currently standing outside of the meeting room in the watch tower, alone. Luckily Batman had explained to the rest of the Justice League that he (Billy) is living with another person and if he was to take the child home, he needs permission.
Uncle Dudley was quiet for a few minutes before he spoke again "It's not about the money, kiddo." His voice as tender as ever "But do you want to?"
"Yes," Billy answered with no hesitation. He could hear Uncle Dudley smile through the phone "Then I'll prepare a room."