Independence Day

Mister Freeze is attacking picnickers in Gotham City park, many of them running away in fear only to be frozen solid. One family stares at the cliff he's standing on in shock. 
"Enjoying family time?" The villain questions rhetorically, then freezes the family. "My family has other plans." He then slides down the ramp now going from the cliff, taking aim at the running citizens of Gotham only for a Batarang to throw off his aim.
"Batman, I was wondering when…" Freeze turned around but didn't see Batman. Turning around, he saw no one, but looking up, he didn't have time to react to a pair of feet smacking him to the ground.
Robin flipped to the ground, sending him on his feet throwing a few more projectiles at Mister Freeze's glass helmet.
"Oh, Boy Wonder, the Bat sent you to drag me off to prison? Frankly, I'm underwhelmed."
"Great, but I'm kinda in a hurry here." Robin was annoyed.
"Kids, always in such a rush." Freeze smiled.
"Wasn't talking to you." Robin called his mentor Batman to deliver the final punch.
----Star City
Over at the City bridge of Star City, the ice villain Icicle Jr. was sowing chaos, creating a wall of ice, and knocking cars off the road. Green Arrow and Speedy were shooting explosive arrows to get rid of the ice. One of them put a nick on Icicle Junior's shoulder.
"Finally, I was wondering what a guy had to do to get a little attention around here." He threw sharp spikes of ice at the two of them.
"Junior's doing this for attention?" Speedy said.
More of the shards of ice are incoming. Green Arrow and Speedy dropped from the bridge and raced down with the wiring.
A few more shots and Icicle Junior threw a big one at Speedy. He gracefully jumped over the ice and flipped out an arrow to knock him out quickly.
"Kid had a glass jaw." Green Arrow laughed.
"Hilarious. Can we go? Today is the day." Speedy said, eager to get to the Hall. 
Icicle Junior was then surrounded by a green bubble.
"I'll take Icicle Junior to prison." Green Arrow and Speedy looked up and saw what looked like a Green Lantern overhead.
Pearl Harbor
At the bays of Pearl Harbor, the ice villainess Killer Frost was attacking the ships, several were frozen over and froze Aquaman still. Behind him flipped over to see his apprentice, Aqualad defending his king and the ships.
Aquaman broke free from the ice, "Don't tell me you're not excited?"
"Right now, my king, I'm more focused on the matter at hand." Aqualad replied as both of them charged Killer Frost while dodging her ice blasts.
Killer Frost fired another ice blast at Aqualad, but he jumped up and forged a pair of maces with his water bearers. Killer Frost fired another ice blast at Aqualad, but he blocked them with his water maces and used the ice to hit her hard in the face. The impact sent her flying a few feet then falling to the ground.
With the fight over, Aqualad sheathed his water bearers and then turned to his king.
Aquaman crossed his arm and then asked. "Well?"
"Yes, I'm excited. Today is the day."
Central City
Outside of a robbed Jewelry store, the perpetrator, Captain Cold, was being circled by Flash and his protege Kid Flash. Captain Cold kept trying to get a hit in from his ice gun, but both were too fast. Trying to hit one of them, he ended up hitting a car instead.
"Stealing ice? Seriously? Isn't that a little cliche even for Captain Cold?" Flash questioned.
"Come on. We don't have time for this." Kid Fash complained, lowering his goggles to finish this fight.
Swiping away his cold gun, Flash gave him a finishing punch.
"Calm down, kid." The Flash assured.
"Oh, please. You'll chat it up with the cops, with bystanders, with Cold even. No, no way. Today is the day." Kid Flash said, very eager to get out of there.
Washington D.C - Hall of Justice
Today is a special day for the proteges of Batman, Aquaman, Flash, Green Arrow, and Wonder Woman. For today these five will be granted access to the Hall of Justice and then be inducted into the Justice League. Four of the five sidekicks stood outside the Hall with their mentors to see a large crowd gathered at the main entrance.
Batman looked down at Robin and placed a hand on his shoulder. "Today is the day."
"Welcome to the Hall of Justice." Green Arrow said.
"Headquarters of the Justice League." Aquaman said.
"The next step for you young heroes." Wonder Woman said.
"Oh, man." Everyone turned around to see Flash and his sidekick Kid Flash arriving with their super speed.
"I knew we'd be the last ones here." Kid Flash complained, crossing his arms in disappointment.
"Have all five sidekicks ever been in the same place at the same time?" Kid Flash asked.
Speedy took offense to the name Sidekick. "Don't call us sidekicks, not after today."
"Sorry. First time at the Hall. I'm a little overwhelmed." Kid Flash said. 
"It's fine." Green Lantern responded after joining them.
Taking the front entrance, the group walked to a door that reads "Authorized Personnel Only." Just then, the doors opened Martian Manhunter, and Red Tornado were waiting for them. "Robin, Speedy, Aqualad and Kid Flash. Welcome." Martian Manhunter welcomed the young heroes.
Guiding the kids to the main library.
"Make yourselves at home." Flash ordered.
Robin, Kid Flash and Aqualad found great spots to sit. They were at the pinnacle of their lives as soon-to-be members of the Justice League. However, one of them wasn't as hyped as the other four.
The Justice League members then gathered to discuss something. Batman then turned to the sidekicks and said. "We shouldn't be long."
Before the Justice League members could leave, Speedy spoke up. "That's it? You promised us a real look inside, not a glorified backstage pass."
"It's a first step. You've been granted access few others get." Aquaman said.
"Oh really?" Speedy questioned, gesturing to the overhead window above the room showing several people looking at them. "Who cares which side of the glass we're on?"
Green Arrow walked over to Speedy. "Roy, you just need to be patient."
"What I need is respect." Speedy spat, then turned to the others. "They're treating us like kids. Worse, like sidekicks. We deserve better than this."
None of them said anything, just exchanged glances with each other.
Speedy looked at them in disbelief. "You're kidding, right? You're playing their game? Why? Today was supposed to be the day. Step on in becoming full-fledged members of the League."
"Well, sure, but I thought step one was a tour of the HQ." Kid Flash said. 
"Just one problem. This isn't their HQ. I've seen a watchtower in orbit while I was going to head to Oa." Green Lantern revealed.
The proteges all looked at their mentors in disbelief. 
"What?" Robin asked as he looked at Batman.