WARNING: The following contains spoilers for the Season 1 finale of Loki, "For All Time. Always.," streaming now on Disney+.
The season finale of Loki shows the birth of the multiverse. However, with the death of He Who Remains (Johnathan Majors), it's clear that the realm beyond time has become a lawless environment without the Time Variance Authority maintaining the Sacred Timeline. As a result, even more variants have the potential to appear and disrupt a system that was introduced back at the beginning of the Marvel Cinematic Universe.
While fans have already seen Loki's variants or at least a glimpse of them, the door is open to see even more versions of other Marvel characters appear in film. This includes his brother, Thor, who has had several of his own variations in the comics, including different universes or entirely different characters taking up the mantle. With the multiverse finally here, there's a strong possibility these variants could make an appearance in the future.
Jane Foster/The Mighty Thor
In the comics, Jane Foster became the Goddess of Thunder after Thor became unworthy of his hammer, Mjolnir. While he went on a quest to find himself, Jane joined the Avengers as the new Thor, taking on enemies while battling advanced-stage cancer. Her story becomes a heartfelt journey on the idea of how far a person will go to be a hero. It's already been confirmed that Natalie Portman will return as Jane Foster and take up Thor's mantle in Thor: Love and Thunder. Now the only mystery is if she will be a variant or the same Jane from earlier films.
Throg
Recently revealed in Loki, Throg first appeared in the early years of his comic book as a frog version of Thor, turned into an amphibian by Loki. However, later years have changed the character to be a separate entity named Puddlegulp. The Frog of Thunder was once a human named Simon Walterson, who was turned into a frog by a witch. He becomes worthy of Mjolnir after finding a piece of it and protects his animal friends in the park from the rats that threaten them. While he was shown trapped in a jar in the Void, there's still a chance this isn't the last of Puddlegulp in the MCU.
Thunderstrike
Eric Masterson is an architect and divorcee who, after being gravely injured, is bonded with Thor by Odin, becoming the second host of Thor. While paired with the God of Thunder, he learns the importance of protecting innocents and fights to save his son on more than one occasion. However, when Thor is exiled for killing Loki, Eric takes up the mantle as the new Thor. But upon the God's return, Eric goes his own way, taking the mace, Thunderstrike, and becoming a hero in his own right. There's no confirmation that Masterson will appear in the MCU, but Thor's attire in Thor: Love and Thunder make a nod to his leather vest from the comics. Plus, with the possibility of variants and multiples of Asgard, Thunderstrike could still appear in some capacity.
Ultimate Thor
The Thor of Earth-1610 is the most unconventional of the more modern incarnations of the character. Living life with mild amnesia, Thor, named Thorlief Golmen, is the God of Thunder but has no access to his powers or hammer. To compensate, he is given a suit and hammer that recreate his abilities. He fights this way for the duration of the Ultimate universe before being restored to his true God-like power. However, following the collision of the multiverse and the beginning of Secret Wars, the character, along with an army of Thors called the Thor Corps, seemingly dies while storming Doctor Doom's castle. His hammer is left intact in the aftermath of Secret Wars' final battle. Though he isn't confirmed to appear in the MCU, his debut could be the most unique yet.
King Thor
King Thor represents the culmination of Jason Aaron's Thor storyline and chronicles the final battle of the All-Father of Thunder. The story acts as a possible future for Thor where he faces the end of time alongside his granddaughters. This Thor is grizzled, missing an eye and arm in service of the realms and his final battle is against his worst enemies, Loki and Gorr the God Butcher. Following his victory, the story ends with him giving Mjolnir to his granddaughters and sacrificing himself to hold off the end of time. While he is one variant that isn't explored much, his appearance in the MCU could serve as a somber moment for Thor, who is living life to the fullest at this point in his life without thinking of the future.
Thor 2099
Thor 2099 is a variant of Thor that is more of a fan than a true God of Thunder. Cecil McAdams is a cleric of the Church of Thor in 2099 who believes the second Golden Age of Heroes is coming. His belief is further bolstered when he and his followers are given a chance to receive the powers of the Aesir. In reality, the nefarious company, Alchemax, gave them the procedure to detract people from their illegal acts. Thor 2099 had a suit and hammer that mimicked the powers of the God of Thunder but were easily turned off and could be destroyed. But, this never stopped McAdams from stopping evil. Thor 2099's appearance in the MCU could show how many strange versions of the hero there are while opening the door to further characters from that year, including Miguel O'Hara's Spider-Man, who's a fan-favorite character.
War Thor
As a senator of the Congress of Worlds, Volstagg the Voluminous is caught in an attack from Malekith the Accursed while trying to bring a group of children to safety. An explosion rocks them, leaving only the Asgardian alive. Filled with rage, the hammer of Ultimate Thor calls to him, turning Volstagg into the War Thor. As War Thor, Volstagg is a vengeful God who strikes to kill and lives to punish. He has the same strength as Thor but lives for battle over anything else. Since Volstagg was unceremoniously killed in Thor: Ragnarok, a variant of him as someone far more violent could be exciting to see and a great way to see Ray Stevenson return to the character.
Beta Ray Bill
One character that fans can't get enough of and want to see in the MCU is Beta Ray Bill. In the comics, Bill is a wielder of Mjolnir because of his nobility and heroism. He proves his worthiness by beating Thor in battle but refusing to kill him. As a reward for his actions, Bill is gifted with his own hammer, Stormbreaker. He is often considered a brother to Thor and has a warrior spirit due to him being the only super soldier and protector of his species. His appearance in the MCU has also been teased for some time, with a statue of his head erected in Sakaar as one of the Grandmaster's champions. While Thor is the current wielder of Stormbreaker, it's still possible for Bill to appear as a variant who either earns Stormbreaker or has one of his own.
While it has yet to receive a release date, Loki will return for a second season. Season 1 is now available to stream on Disney+.