Spider-Man Beyond the Spider-Verse First-Look as Films Villain
Furthermore, CWGST claims that The Spot will eventually become an embodiment of The Abyss after "augmenting his powers." The only character named The Abyss that we're aware of is a boss from an early Spider-Man video game.
"Across The Spider-Verse is a movie on its own, but it definitely ends on a bit of a cliffhanger. I think it's a good cliffhanger. We hope that it's a satisfying tee-up for what's coming in the third film, because you want people to be excited about what's coming next. And it helps that we knew going in that this was part two of a three-part story. Since you already know that that third story is guaranteed, you can tackle it a bit differently. That being said, there's a lot of key characters in this film, and there's a story in this film that has an arc of its own that we needed to complete."