You know where...

"Of course I know he's not Chaos" Disco says, without taking down his sword "The time traveling machine I've been developing since my previous plan failed detected the anomaly. He's a younger, uncorrupted version of Chaos, trapped in his future"

Hourly: Then... Then you must let him go! He's innocent!

Disco: He's innocent now, but in the future he will be responsible for the death of millions, including your parents, the rest of the MBL, and the Team MBL.

Joker2: You mean... they are dead...? Stu? '86?

Disco: Yes, thanks to this madman. I chosed this day to attack the Castle because I knew it'd be easier to confuse him. Now I will prevent this madness from happening, with one single strike of my sword.

Joker2 and Hourly look at Disco worried and scared. He was a father for them for years. To see him like this is a shock for them.

Joker2: Listen to me, Chief... This Mxy comes from another Hyperboard... He's not the one you knew... He's--

Disco (sweating and shaking lightly): NO! He-- He's-- HE MUST DIE!

Disco/Nowhereman swings his sword.

Eurostar: Enough!

The young Eurostar prevents Disco from killing Mxy with his super-speed. He pushes Disco to the ground. The impulse Eurostar used makes the sword fly in the air. Then the starts falling, attempting to kill Disco Steve.

Joker2: NO!

Joker2 catches the sword in the air before it hits Disco.

"Let's go away now, ok?" says Hourly, disgusted.
As the effect of the drug starts wearing off, Mxy asks: "But... my... my body..."

Joker2: Don't worry, as soon as we teleport to the next Hyperboard, you will recover your old body, and this one will stay here.

Joker2 throws the sword to Disco.

Joker2: Here, take this. Kill him if that's what you want. Let's get out here.

Disco catches the sword, and looks at Joker2. Joker2 turns his head the other way, to go away with the team.
When they fade away, leaving only Chaos's uncouncious body, Disco Steve stands up, and cuts his head with his sword.

"This is not over, Mxypltk" Disco says, wiping the blood out of his sword "This is not over"