(The heroes proceed to the sixth floor of Aku's palace as they slash more of Aku's legions.)

Y/N (Anim. Optimus): So, are you ready to face the Legion of Doom?

Lee/Marie/May: Well... we're ready to see you rock against them.

Robin: He won't be the only one.

Batman: Concentrate, Robin.

Superman: I knew it would come down to this.

G. Lantern (Hal Jordan): Just to be expected from likes of Lex Luthor or Sinestro.

(Then the Legion of Doom is seen waiting for them alongside Doctor Animo, the Hive Five and Demongo.)

Y/N (Anim. Optimus): Are you ready? It's time to defeat this Legion of Doom. Once we take them down, we'll be facing Aku.

(Then the villains step in.)

Y/N (Anim. Optimus): So, Demongo... it's time, huh?

Demongo: Yes, it is. And this time I will defeat you!

Lex Luthor: No, Demongo. I will be the one facing him.

(Then parts of Luthor's newest suit, based on Optimus Prime's archenemy attach into him.)

Luthor: Behold, my newest suit, based on the leader of the Decepticons, Megatron. 

Y/N (Anim. Optimus): So you wanna face me instead of Superman. 

Luthor: That's right. 

(Then Y/N changes his Animated Optimus Prime form)

Y/N (Anim. Optimus): Now I'm ready to fight you.

Batman: Time to roll out.

Lex Luthor (Megatron): Legion of Doom, attack!

(Then the heroes and villains charge at each other while Y/N and Lex Luthor are still face to face.)

Y/N (Anim. Optimus): You will taste defeat, Luthortron!

(They fight. Luthor's newest suit is more powerful than his original suit in every aspect. But Y/N has the power of all Optimus Primes, and he manages to defeat Luthor.)

Y/N (Anim. Optimus): On your feet.

(Then Lex Luthor barely leaves his Megatron suit as Superman slams into it, destroying it.)

Superman: I guess Luthor won't need it anymore.

(Then Y/N changes to the Prime Optimus Prime)

Y/N (TFP Optimus): Let's get it on.

(Then Jinx tries to attack Y/N, who manages to block each of her attacks, and then shoots her. She doesn't give up, and tries to take him down once again, but fails miserably. Getting angry, Jinx tries to blast him, but Y/N dodges and hits her with a blast of his own.)

Y/N (TFP Optimus): Not bad for a bad luck girl.

Jinx: If someone is unlucky, dear, it's you!

(They fight. Those who fight Jinx tend to get unlucky, and Y/N was no exception at first. But Y/N learned all about her tricks, and turned her bad luck against her, defeating her.)

Y/N (TFP Optimus): I'm impressed. 

(Meanwhile the Crystal Gems tackle Peridot while Ben 10 pounds Doctor Animo's giant mutant as Four Arms. Hal Jordan, Jessica Cruz and Guy Gardner dash at Star Sapphire, who charges at them.)

G. Lantern (Hal Jordan): Alright, Jessica. Just like we practiced. 

G. Lantern (Jessica Cruz): Okay.

(The the three Green Lanterns combine their attacks and hit Star Sapphire. Meanwhile, Y/N changes to Robots in Disguise Optimus Prime, and shoots the Supervillain Girls.)

Harley Quinn: Hey, stop shooting.

Y/N (RID Optimus): No can do, villains. My job is to take down likes of you.

Supergirl: While he keeps you busy, I can do this!

(Supergirl hits Poison Ivy with her heat vision.)

Harley Quinn: You dare hurt my friend? You bastard!!!

(As Harley charges at Supergirl, Batgirl kicks her in the face.)

Supergirl: Thanks for the assist, Babs.

Batgirl: Anytime. 

The Joker: Oh, Harley... always a disappointment... why do I...

(Suddenly Batman knocks the Joker out.)

Batman: Never lower your guard.

(Then Y/N transforms into Dark of the Moon Optimus Prime.)

Y/N (DOTM Optimus): Alright, Demongo. You and I will fight.

Demongo: So be it.

(They fight. Demongo possesses the essences of mighty and skilled warriors. But Y/N has a mastery over his skills and eventually manages to defeat him.)

Y/N (DOTM Optimus): You lose, Demongo. 

Demongo: No... that's impossible... how could I lose?

(Then Y/N shoots Demongo, blasting him while the others have already defeated the Legion of Doom.)

Y/N (DOTM Optimus): Now we just need to destroy Aku.

Juniper: We will win, won't we?

Y/N (DOTM Optimus): Of course we will, dear Juniper. Alongside the other heroes, we will be able to defeat Aku and live to see the future. 

Dexter: Now let's go and save Cartoon Network City!

Heroes: YEEEEEEEAAAAAAAH!

(The final battle is about to begin. One shall stand, one shall fall.)