Many of those who watched "Arcane" would agree that season 1 opened a lot of possibilities. It's not just from the show itself. Some fans took some references from League of Legends (LoL) as well, the game that the show was based on. Here are some fan theories that would make you realize just how much you missed on the show.
Vander Might be Alive
Out of all the fan theories, this might be the most prominent. The theories say that Vander might actually return as the game character, Warwick. If you haven't played the game, Warwick is a playable werewolf character. In the show, Vander was called "the Hound of the Underground." This could be foreshadowing his transformation.
Also, Jinx was saved by Singed using Shimmer, and he might do the same with Vander. After all, he already did consume Shimmer in order to save Vi. Since Warwick was a man turned into a werewolf by Singed in LoL, it's not that far-fetched, especially since you can hear parts of Warwick's theme in the show.
Orianna Could Be Singed's Daughter
Fans suddenly have sharp vision when they look for easter eggs in a show, which we are thankful for. They noticed a scene with Singed where he was holding a locket with a girl's picture, and pointed out that the girl in the photo's hairstyle is similar to Orianna's, a playable Character in LoL. Her lore also adds weight to the theory.
As mentioned in Kotaku, her father was a tinkerer named Corin Reveck, and he replaced every part of her body to save her from dying of poison. First, it was never mentioned in the show what Singed's real name is. Second, it was mentioned that he had a daughter. If you add all those factors together, fans really might be on to something.
Ekko and Heimerdinger Could Create Z-Drive
In the show, we can see Ekko holding a timer device. He even used it when the epic face-off between him and Jinx happened. This could be a nod to one of his skills in League of Legends, wherein he could turn back time for a few seconds. Ekko is already a good inventor by himself, but now that he and Heimerdinger have met, things might become more interesting.
Fans theorized that Heimerdinger will help Ekko create the Z-Drive. In the lore, Ekko used a Hextech shard to power the time-turning device. As mentioned in The Magic Rain, the centuries-old former Council member might use his connections, and acquire a Hextech shard for him.
Viktor 2.0
Toward the end, we can see that Viktor managed to turn parts of himself into a machine, using the Hexcore. This could be the beginning of him slowly turning himself into a full-on cyborg, which can be seen in the game. We even had a sneak peek of the hand protruding from his back, as he and Jayce demonstrated new Hextech devices.
In the game, Viktor was called the "Machine Herald," believing that fusing humans with technology will advance humankind. Seeing as the Hexcore might've saved him from his life-threatening illness, it's quite possible for his show character to be like the game character.
Council of Ashes
Personally, one beloved character turning to dust is already painful enough. But, take comfort in the fact that when Jinx decided to fire a missile at the Council, two of the main character were there. Surely, the "Arcane" writers aren't crazy enough to kill off Jayce Talis and Mel Medarda? I hope not, because Mel could possibly be the link to a Noxus storyline, and we are all for it.
