Ok so, as most people know in Parrot's latest video. Toward the end, Theo was different. He seemed a bit more scarred/scared and was more reluctant to do what Parrot proposed than he's ever been.
My speculation is that Theo, in the next few episodes Theo is going to leave Parrot(Either without letting him know or maybe just having an argument and leaving him) and go on like a 2-3 episode long training arc off camera and train either alone or maybe with someone? idk. After training, he will try and go back to Parrot but as he reaches Parrot's castle, he sees Parrot getting attacked by ShoeBilly and being on the blink death. When he sees that, he pearls in and Insta Cart/XBow carts Billy, Popping him and catching him offguard. Parrot after seeing Theo gets really happy and Theo tells Parrot to run and then Theo starts fighting Billy again and in that fight, he end up killing Billy.
This is just a theory I came up with like 15 minutes ago, and it might not be be too logical, but to me it seems like something that has a chance of happening, and what will finally give Theo his revenge on Billy
Thoughts?