ROBIN BEFORE TIME SKIP WAS 15, SLADE WAS 26 (just go with it : p)
Location: Gotham Skyscraper Tops
POV: 3rd Person
Subject: 10 Year Time skip

A red and black cloak was attached to the small bird's back. Along with a black utility back, there was a matching outfit, which was fitted perfectly for the bird mercenary and he was loosely holding a black bo-staff. Beside him was a black and orange covered figure, clutching a long sword with a black blade.

Across from them there was a group of oddly dressed people, each holding their respective weapons. They each looked sad but understanding. Understanding that their small bird was no more and that he willingly served the dark or more specifically, Deathstroke aka Slade Wilson, Master mercenary, Master of hand-to-hand combat, Master manipulator, Master of various weapons, etc. etc.

You see, this turned bird is-was Robin aka Richard 'Dick' Grayson-Wayne. Sidekick/Partner to Batman, friend to the Justice league and young justice. He was their light, their pride and joy. He was the glue to the project that was them. But now, he was gone. In place is 25 year old Renegade, skilled assassin/mercenary , acrobatic, and lover of the heartless Deathstroke.

Renegade stilled his gaze to the opposing team, he spoke in slightly deeper voice with a still hint of childishness, "what are you doing here?"

Batman took a step forward, nearing closer to them, "Ro-" "Renegade, it's Renegade now, Bat." "Renegade, we need you back."

Renegade, fueled with anger, gripped his bo-staff harder, 'he seriously wants my help? After everything?!'

Slade, sensing his lover's anger, clutched his long sword harder and stepped a few paces foward.

"Batman," Slade spit out, "you know, as much as just love to see you again, we must get going. Me and Renegade have a job to do."

At that Batman and the team ran foward to fight. They couldn't let them leave. They needed Ro-Renegade for the upcoming war.

(A/N: Fight scene made by Pegasisters_Rule)

It started with Aquaman.

"We cannot allow​ you leave." Aquaman said stepping forward, ready for fight they all knew was about to brake out.

Renegade stood there with his hair covering his eyes. "I.. I don't understand. Where do you get your enjoyment out of this?" He asked, but he didn't sound hurt. He sounded curious. "Every human being has the instinct to fight. It's just how we are designed. So telling me is also part of your instincts as well?" He started forward "I'D LIKE TO FIND OUT"

Suddenly he was engaged in combat. Nothing new to him, combat had been his hole life. He was currently in a one sided match with Aquaman, turns out surprise attacks can really catch him off guard.

"My King!" Aqualad joined in, with his water weapons ready.

Before anyone else could jump in to help there were stopped by Deathstroke.

"Now, now tell me how is it fair for all of you to go against a single boy?" The league tried to ignore him but that soon turned out to be harder than expected when he held out a bomb controller. "Now if anyone else joins in the fight....well let's just say I hope your cities don't go into a rage when schools start exploding." They were stuck and so was the fish people.

Renegade really learned fast, but [hey], when you know everyone's weaknesses already it's easy. The king and teen from underwater were currently fighting back gun fire. Something no one was expecting, but that didn't matter they had a job to do as well.

'Ms. Martin, Manhunter NOW' Batman yelled through their mind link.

Suddenly both martin's eyes turned green and the two opponents were out cold.

Batman looked at Dick, his past ward, sadly.

"I'm sorry it had to come to this. I wish we met again under different circumstances."