Twilight Sparkle, Captain America, Spider-Man, and Iron-Man approached the Canterlot Castle gates, not sure of what Princess Celestia would think of these...guests. A pair of guards opened up the gates, and the group walked into the castle, where Princess Celestia awaited for her favorite student and three human guests.
"Welcome to Equestria, humans" Princess Celestia greeted the three men.
"How do you know what we are?" Spider-Man asked Princess Celestia.
"Our wizard, who was named Starswirl the Bearded, traveled to the human world once" Princess Celestia answered.
"That reminds me of a TV show called My Pretty Pony back in 84'" Iron-Man told the group, "It's a show about a pony who befriends two kids and they have girly adventures-"
"How do you know about this show?" Twilight Sparkle asked Iron-Man.
"Well...uh..." Iron-Man blushed in embarrassment "My...uh...sister...watched it..."
"Just keep telling yourself that" Spider-Man thought to himself.
"That sounds the dumbest, most girly thing ever..." Princess Celestia sighed, "Anyways, do you three have any information on why these two planets are colliding?"
"We're just as clueless, your highness" Spider-Man informed Princess Celestia.
"What does that mean?" Twilight Sparkle asked.
"Well, we've predicted that in about two days, both worlds will collide with each other" Iron-Man answered grimly. The guards gasped, as they ran out of the building.
"There has to be something we can do..." Princess Celestia told the group, "Twilight Sparkle, Spider-Man, I want you two to find some way to fix all of this"
"Sounds cool to me" Spider-Man acknowledged Princess Celestia.
A few hours later, Spider-Man, now Peter Parker, was working with Twilight Sparkle to find a solution. Together they ran through hundreds of different solutions.
"Hm...maybe we could use a gravity beam?" Peter Parker suggested.
"We don't have the technology" Twilight Sparkle shot down the idea, "Maybe we could try to shrink one of the planets?"
"We don't have enough Pym Particles to do that..." Peter Parker informed Twilight Sparkle. Twilight Sparkle teared up and put her face on the table in a combination of sadness and frustration. Peter Parker put her hand her Twilight Sparkle's back, comforting her.
"Don't worry, we'll find a way to stop our two worlds from colliding, we have infinite ideas" Peter Parker hugged Twilight Sparkle.
"Yeah, the two of us have could make ideas, more ideas then infinity!" Twilight Sparkle cheered.
"Infinity...Infinity...the Infinity Gauntlet!" Peter Parker exclaimed.
"What's that?" Twilight Sparkle asked.
"Six Infinity Gems can be used to do practically anything!" Peter Parker explained.
"That sounds like the Elements of Harmony..." Twilight Sparkle told Peter Parker, "We could use them both!"
"But we need to find them first..." Peter Parker sighed.
Meanwhile, back in Ponyville, Bruce Banner was trying on some clothes made by Rarity. He tried on regular white dresses to strange, Victorian dresses.
"You look so ridiculous with those clothes!" Rarity giggled along with Bruce Banner, who was standing like a horse.
Thor was busy showing off some lightning tricks for a birthday party run by Pinkie Pie, and Captain Marvel was talking to the CMC, which consisted of Sweetie Belle, Rarity's younger sister, Applebloom, Applejack's younger sister, and Scootaloo, Rainbow Dashes "sister".
"You girls can strive to be anything you want" Captain Marvel told the CMC, smiling.
"Can we be big shot heroes like you?" Applebloom asked Captain Marvel.
"Of course!" Captain Marvel answered joyfully, "We need more super heroines in the world!"
"Yay! Cutie Mark Crusader Super Heroines!" Sweetie Belle, Applebloom, and Scootaloo chanted as they ran off, worshiping their new idol.
Everything seemed to be...peaceful. However, the sounds of cracking and breaking could be heard outside of Ponyville. Many pony citizens gathered around the noises, as a large, blue portal opened up. The pony civilians stared in disbelief as the portal began to spark, as a large Chitauri Leviathan came through the portal, charging at the pony civilians.
Suddenly, dark clouds began to develop over the Chitauri Leviathan, and a giant bolt of thunder struck it, killing by electrocution. The Mighty Thor stood upon his dead trophy and raised Mjolnir in victory.
"Hooray! Three cheers for Thor!" The Civilians of Ponyville cheered.
However, their cheers were short-lived, as more portals opened up, unleashing more Chitauri Leviathans, along with Chitauri ground troops began to charge through the portal. Thor slammed Mjolnir on the ground, striking down as many Chitauri ground troops as possible.
"What're we going to do?!?!" Rarity screamed at Bruce Banner.
"I have an idea...make me angry!" Bruce Banner commanded Rarity.
"Alright!" Rarity breathed in and out, "You're the ugliest, stupidest, filthiest, ruffian I've ever met!!!"
Bruce Banner began to snarl as his skin began to change to green, his clothes began to rip, and his pants ripped and became purple. Bruce Banner was now the Hulk!
Thor and Captain Marvel taking shots at the Chitauri ground troops, with lightning and cosmic blasts respectively. As another Chitauri Leviathan appeared from a portal, the Hulk jumped onto it and began to rip it into pieces.
"Finally!" Captain Marvel exclaimed, blasting another Chitauri Ground Trooper with a yellow cosmic blast.
Meanwhile, back at Princess Celestia's palace, the phone began to ring. Princess Celestia walked over to the phone, and used magic to lift it to her ear.
"Yes?" Princess Celestia answered.
"WE NEED BACKUP!" Mayor Mare panicked, "NOW!"
"Cap, Spidey, Twilight, we're heading back!" Iron Man commanded, "We're getting them some backup!"