Tony landed on the ground, Thor landing shortly after.

"So you don't hate friend Steve? Then why would you two keep on... Well arguing? That does not seem healthy." Thor asked he simply could not put his hoof on why the two argued; after all, they were friends... right?

"Well, no. And I don't know, maybe because Steve hates my guts!" Tony replied, raising his hooves in a dramatic manner. Then laid them down on ground looking around,

"Hey have you noticed the lack of ponies here?"

Steve galloped toward the other side of town, Bruce followed him, already tired from running (he were a scientist! Not an athlete!) Still wondering just were the captain were going.

"St-" he did not get to finish, as he found his face planted on the ground.
"B-Bruce!" Steve said, stopping and running over to his fallen comrade. "A-are you okay? What happened?"

Suddenly a laughter -though it sounded more like a mixture of chuckling and hiccups- were heard around the clearing.
"Oh the Scientist and the soldier! How nice of you to stop by!" A voice said, it sounded cold, yet amused.

"Loki!" Steve said, quickly letting his back face Bruce in a defensive pose "What did you do to Bruce!"

Loki appeared in front of the blue earth pony, green sparks around him. A teleportation spell.
"I did not do anything, he simply tripped!" The pony, a grey unicorn with emerald eyes and a black mane/tail, said in defense.

"You did so!"
"Did not!"

"Did so!"
"Guys"

"Did not!"
"Did so!"

"Guys!"
"Did not!"

"Did so!"
"Oh will you two be QUIET!" Growled the pony behind the two, shakily raising from the ground. His brown eyes sparkling green slightly.

"Oh, you're up! How are y-," Steve asked, stopping mid-sentence at seeing Bruce's fur getting a greenish shine.
"Loki, are you doing this?"

"No..." Loki replied stepping back, "You might consider running Soldier."
With that Loki's turn shone as he teleported away, leaving green sparks behind.

"B-Bruce we can talk about this..." Steve stuttered, walking backwards as well, feeling his hoof step on something, looking down he noticed Thor's ~~plush~~ hammer.
He squeed with joy "We found Mjolnir!" Then realized Bruce were not calming down.
Bruce... or rather Hulk roared.

Now in case you don't know, Bruce got a minor Jekyll and Hyde thing going on, he can change from being good ol' Bruce, to being Hulk; A large -compared to his age at least- green earth pony, who gets stronger the angrier he is, not only that but he's always angry.
Yeah, not imagine Hulk being mad AT YOU.
Now let's ignore the fact Bruce first becomes Hulk as an adult in the Marvel universe, this is an AU, everything can happen.

So obviously Steve first thought were running away now, so he did that.
His little hooves quickly galloped away from the angry 'beast' who were his friend.
He swore he heard a flap of wings, though his thought quickly got confirmed as a red Pegasus flew down holding onto him.

"Okay then... up up up!" Tony shouted flying upwards carrying the earth pony.
"A LITTLE HELP THOR?!" He then shouted, but the golden pony were busy on the ground staring at the green earth pony.

"Banner, we are friends, we should not fight." Thor said sternly at the raging pony in front of him.
The beast only growled, stomping closer.

"You mustn't be mad; friend Steve did nothing against you."
Hulk came even closer. "Hulk strong, HULK SMASH!"

"Is that a challenge, foul beast?" Thor said voice eager as he grinned, his wings raising in the air as he posed for battle.
The beast roared in a reply, the roar seemed confirming though.

Steve had recently dropped the plush when running for his life, and due to the matter of forwarding the plot, it was near Thor.
The pony spread his wings and flew over to the plush picking it up with a simple levitation spell.

"Then bring it," The alicorn pony said with a determinated expression filling his face.
And then he flew toward the giant earth pony.

Tony meanwhile had dropped down Steve on the ground, Natasha and Clint having joined them.

"So, Bruce got angry for tripping? But... That is just silly! Why'd that make him mad?" Clint asked, his wings puffing up.
"Maybe he were stressed? We did do a lot of running..." Steve admitted, ignoring the chuckle from Tony at Clint's wings.

"But it's still too silly!" Clint complained, his face just screaming 'this is stupid!' (Maybe he needed some naptime? Tony considered this being a good reason)

"So are we gonna help thunder tights-" Tony asked, hearing Steve cough at the nickname.

"I mean Thor... Are we going to help Thor with beating Hulk, or let the big guys solve this on their own?" He continued.
"I bet he would prefer handling it on his own, besides Hulk's quite a meanie" Natasha replied, glancing at the two ponies fighting.

"I don't feel like getting beaten up by him either," Clint added.

Tony nodded and then grinned "I suppose this concludes it, let the big guys do the talking!”

Author's Note

A new chapter, what a miracle!

...English isn't my first language, please tell me about grammar mistakes if you'd please~
I'd also like to point out I'm thinking of Loki as being a natural talent in magic. Thus why he can use more advanced spell considering his age. (And don't question Thor being an alicorn and Loki not being one. Remember Loki is actually a frost giant, even if he were a prince there, no one has confirmed them being alicorns when part of their royal family. OwO this isn't even confirmed for Aesir.)

sorry about this not being 'adorable' or 'cute' ;Å;
[I got A LOT to do this week by the way, I might not update until next week or the weekend, yet I might update tomorrow, who knows?]