Seeing the young girl is sleeping in her bed. But having the nightmare, before she opens wide let out of the gasped.

.....

Seeing of all the crowds of Gotham, seeing of the Batman merchandise to honoring of their beloving hero and protector known as Batman.

Announcer: 10 years ago, after the death of our beloving hero known as Batman. He fought believe for the city of Gotham to take back what it belong for Gotham. 

As everyone lower their heads down in sadness.

.....

Seeing of the same girl staring at the Wayne Industries building. It now abandoned and bankruptcy, she arriving back to her apartment meets her uncle Jacob Kane.

Jacob: Hey, Amy how was school?

Revealing the young girl is Amelia Wayne or Amy for short. She is the younger sister of (Y/N) Wayne. And now she in care of the Kane Family, her only family relative from her mother side.

Amy: I'm doing and great, Uncle. *Smiles*

....

Seeing of Amy inside of her room, she become saddened staring at the old photo of her with her older brother (Y/N) Wayne.

Changes she was console by her uncle knowing she miss them.

Jacob: Looks, Amy I know it been tough for you when you lost your brother and Alfred. I know you miss him, but I miss him too. But you got to move on, they will always in your hearts. *console tone*

Amy: I will... *Sob and nodded her head*

.....

Seeing of Jacob in the meeting of his newly organization elite military force called as "Crow".

Jacob: Crows represent order, security, safety. *Serious tone*

.....

Seeing of Amy with her friends are in the party congratulation her uncle's newly found organization.

Amy: Look at you, General Kane. *Smiles and joke*

Jacob: Thank you, Amy. *Smiles and kiss her cheek*

 However.....

There is the enemy coming willing to take over on Gotham. After Batman's Death....

Suddenly, there is the disrupting the tv screen as it went static like taking over. Before showing the video message revealing a woman.

Alice: Hello, sad Alice. Did you think Crows will protect Gotham like Batman did? Hahahahaha.... No! Batman is dead! Now it is time for us to reveal ourselves!!!!

Suddenly they were ambushed by the terrorists called Wonderland. As everyone let out of screaming in terrified.

As Amy try to be searching of her friends, however she spotted her friends got kidnapped unable to save them and knocked in cold.

....

Amy woke up in hospital bed. She let out of the sobbing in tears and embrace by her uncle.

Amy: They're got my friends....

Jacob: I know..... We'll find them....

....

Amy: I'll wanna help, Uncle Kane. *determine tone*

Jacob: Amy, it's too dangerous for you. I need you to stay at home and lock at your home, you be safe. *Worried tone*

Seeing of Amy secretily sneaking out of her apartment home. She performs parkour and changes she beat up of the pervert boys. And then

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She punches in the groin!

https://youtu.be/gLMHKCckV7c

Amy: Please.... I did punch some ass....

.....

Seeing of Amy riding on her bike, returning back to her old home..... The Wayne Manor.

She exploring of her old home in ruined. She looking at the painting of her family picture, seeing the face of her older brother is holding of her baby self.

She forms the sad looks, suddenly she trip down falling down in the hole going to the deeper in the cave.

She groans in pain, suddenly the swarms of bats flying through him as she covers herself. Suddenly everything is turn on of light.

She opens wide with the shock and surprised looks on her face. Before she turns facing revealing the displayed of Batman's suit.

Amy: OH.... My..... God.... *Shock tone*

[???: Hello, Amy.]

As (Y/N) let out of the flinched and startled, before she turns facing at no one. She looks around for the bit, she glances at something.

Revealing is (Y/N)'s A.I Computer.

[Computer: How can I available for you?]

Amy: Uh..... HI.... *nervous tone*

....

Amy: Computer.... Is there any of my brother left it for me?

[Computer: Yes.... Would you like to access it?]

Amy:.... Yes. *Smirk*

.....

Seeing of Amy looking at the computer, she currently creating of gadgets and making of her gagdets. She then suit up.

....

From Doctmar123

The Creator of Kamen rider Decade x Animverse, Kamen rider Kiva x Demon Slayer: The Bloody Dark Moon, Spider-Man x Bang Dream: Is on Dream!

Seeing the thug being force pulled away, as the hostages opens wide. Suddenly the another thug pulled up in air by the cable hook. As Alice tried to found someone.

Suddenly there is the shadow figure in familiar behind of the curtain. As Alice smirks knew Batman return.

Alice: Batman! I knew you could return! So glad you could joins! How you be....

She opens wide, knowing it is not the Batman.

Revealing it's the.......

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It's the girl!

Alice: You're not Batman! Who are you?! *demanded tone*

Under her mask is Amy.

???: I'm..... Batgirl. *Serious tone*

.....

New gadgets!

Seeing of Batgirl jumps through the window shatter into pieces, she activate her cape glide in air like the wings. Batgirl throws the new improved Batarangs.

And Batgirl ride of her new vehicle called Batcycle. As she drive.

....

New Enemy

Tinkerer

Plague Doctor

Scarecrow Girl

Old Allies

Izuku Midoriya smiling at the bat signal to remembering of his best friend.

Yukina Minato visit to the grave of the name she love. (Y/N) Wayne.

Kasumi Toyama playing her guitar remember of the young man she in love with (Y/N) Wayne. She wanted to cried.

Tatsuya Shiba saluted.

Kiana Kaslana smiles at the old picture of (Y/N).

....

A New Hero is Here.

Is Here

Seeing of Batgirl stopping on her enemy like Alice, changes to fight against on Tinkerer.

Seeing of Jacob looks at the sky, and one of the children shouted out.

Kid: Looks it's Batman!

Seeing of Batgirl standing the ledge of rooftop building. Next to the Batsignal in the sky of night.

Batgirl: I don't know why my brother has kept the secret from me, and why he didn't tell me that. I'm going to find out the truth and honor of my brother's legacy.

Batgirl: The New Legacy of Bat

Amy: Computer.... Think I can get my batmobile?

Seeing of Batgirl in her batmobile.

[Computer: Maybe.]

End Trailer