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human
[MCU] What would life have been like had Loki's takeover succeeded?

Let's say Loki and his army win. The Avengers, US military, SHIELD — all that is driven back and rendered powerless to remove him in the near term. Ditto for other Earth heroes. They can revolt later after gathering themselves, but Loki has won the first round and is in a position where he has some breathing room and will not face open rebellion for the moment.

So... what is this like for ordinary people? Loki doesn't seem like he wants everything turned into a dystopia. Will he try to create a thriving, Asgardian-tech wonderland with a high standard of living, to show he can be a wise ruler? What about the icky envoy dude who talks about how humans will make good slaves — what is it we're going to be forced to do?
gpt
Based on what we saw when he was impersonating Odin, Loki isn’t going to be a particularly cruel ruler. He’ll be lazy, with no interest in being wise or even competent, and just want to bask in the glory of ruling. He does, however, execute all the Avengers with the exception of his brother. Not being able to bring himself to kill Thor, he uses the Tesseract to banish him back to Asgard. He hoped with the Bifrost still destroyed, Odin will be happy enough to have his son back and won’t bother to try to come to Earth to stop Loki with the full might of Asgard.

Life on Earth can go on somewhat as it has, except that people will have to pay tribute to Loki, things like that. Loki being the arrogant fool he is, conveniently “forgets” about his deal to give the Stones to Thanos. He may not realize exactly what they are but, like Ronan, he figures with both of them he’s powerful enough to deal with it when the time comes.

With Loki hoarding the Stones, Ultron never emerges. Scarlet Witch and Quicksilver are never created. Hive never comes to Earth because most of SHIELD and HYDRA were destroyed in the Battle of New York and its aftermath. The Vision never comes to be.

Loki’s reign will prove to be rather brief, however. The current Sorcerer Supreme, who in 2012 is still the Ancient One, takes note of Loki’s use of several Infinity Stones. While she may not be interested in Earthly politics and petty matters like who the ruler of the planet is, the use of Infinity Stones does alarm her. She begins to prepare Earth’s sorcerers, including Wong and Mordo, to battle Loki.

Speaking of Infinity Stones, not long passes before the Aether emerges and possesses Jane Foster as it did before. However, without Thor to bring her to Asgard Malekith never finds out where the Aether is and does not invade Asgard, choosing instead to bide his time. Instead, Jane is found by the Ancient One and brought to a Sanctum. With their magic, they are able to remove it from her and harness it.

Now, Loki has two Infinity Stones and the Ancient One has two Infinity Stones. She has no interest in using hers, however, because she more than anyone on Earth is aware of what they are. Instead, she has secretly  been building an army, a rebellion against him of both powered and non powered people. Fighting against Loki will be such heroes as Spider-Man, Ant-Man, Daredevil, Black Panther and Ghost Rider. On Loki’s team are Abomination, Aldrich Killian, Grant Ward, the Winter Soldier, Darren Cross and a brilliant tactian and family man named Helmut Zemo.

A huge war breaks out that devastated the Earth. The Ancient One and her teammates fight bravely but are ultimately overpowered. Loki prepares to personally execute the top members of the resistance against him, but just as he does, his brother appears!

It appears Thor took advantage of the Convergence of the Nine Worlds to find a way back to Earth. He implores Loki to stop what he’s doing and relinquish his throne. If he doesn’t, well, Odin is working hard to fast track the repair of the Bifrost and will invade Earth with all of the armies of Asgard as soon as he can. When that happens, Loki will lose his new playthings.

Loki considers this, but quickly uses the Tesseract to once again banish his brother back to Asgard. He’s not afraid of Odin. He’s not afraid of anyone.

He goes back to what he was doing before; he prepares to execute his enemies. He has set up a huge public execution with all the villains there to watch him slaughter all the heroes. He begins with the most pathetic of all the heroes; Ant Man. He brutally decapitates the criminal. 

As soon as he does so, however, he sees he is once again standing before an unharmed Ant Man. He quickly kills him again! But, as before, he sees himself before an unharmed Ant Man.

Scott explains to Loki that he’s caught in a time loop. Despite the Ancient One’s orders, Scott stole the Time Stone and plans to use it to save the day. He holds up the Stone and explains all this; Loki, however, has his own Stone. The Mind Stone! He taps his staff to Scott and orders him to break the loop.

Oddly, it doesn’t seem to work. Scott waves the necklace around, taunting Loki rather stupidly and bragging this is how he’s keeping the loop going. Enraged, Loki snatches the necklace holding the Time Stone out of Scott’s hands. As soon as he does, however, he begins to shrink. Scott snuck one of his discs onto the Necklace. Loki shrinks and is banished forever to the subatomic realm. The necklace holding the Time Stone clatters to the ground and Scott quickly snatches it, and the Tesseract, which is still safely in a protective device.

Scott has defeated Loki, and now he turns to see the Ancient One standing before him. She tells him he has done well, but now must hand over the Tesseract and the Amulet. Reluctantly, he does so. As soon as he does, she blasts his head off with an Eldritch bolt. Then she takes the Tesseract and Amulet and hands them to a man who steps out of the shadows; it’s Zemo. He smiles and looks down at the head of the staff in his hand. He switched Loki’s staff for a fake and used the Mind Stone himself to control the Ancient One. With the Aether she had been carrying, he now has four Infinity Stones for himself. The heroes AND the villains watching this gasp in horror.

Zemo isn’t a power hungry man, but he is a practical one. All the time he was in Loki’s employ, he talked to his former boss. He learned of Thanos, and realized that he would be coming for Earth, expecting to get the Tesseract and the Mind Stone back. 

Zemo explains this to all of the remaining heroes and villains. He tells them the battle ahead will be hard, but they must work together if they want to defeat Thanos.

Spider-Man, Black Panther, Ward, Ghost Rider, Daredevil, Punisher, Bucky, Abomination and the others reluctantly agree, and with a thought, Zemo zaps them all to Asgard. He explains the situation to King Odin; Odin doesn’t think Zemo is worthy to carry all of that power but is in no position to take it away from him. He agrees to send an army, including Thor, to help battle Thanos.

Using the Tesseract, Zemo opens a portal to deep space. Protected by a magic spell, Spider-Man, Abomination, Mordo, Thor, Punisher, Daredevil, Ward, Ghost Rider and the rest of Zemo’s Avengers enter. 

This Infinity War will be very different. They are taking the fight to Thanos.