In a similar fashion to Miraculous Ladybug's later seasons, Theo and Alisha will partner up with Beasticons and mystical armors of their own
As seen by Jade and Crimson Lord's armors, as well as the tapestries stolen by Black Tiger, more Beasticons and armors could exist out there. Perhaps in case of need, they'll train up with Gramgram and Gram to be up to the task should Jade need magical allies aside from her existing friends. Kai will learn to master kung fu with Crimson Lord if he comes back to Ban Tang
After the events of the first season finale, Crimson Lord might decide to atone for his actions by forming Kai into a hero rather than the villain he was setting him up to become. For added hilarity, he might do so by borrowing Will's body like the latter suggested before.- Kai could possibly adapt his dancing moves into fighting techniques, show his own style in the same way Lan Jun thought of combining powers with items in odd ways.
Similarly, Kai will get an armor of his own
Whether by picking up shards or finding a spare one, he could rebrand the House of Crimson to be an ally to the Jade Armors. For added irony, he might end up teaming up with Xinyan.- Should he encounter Lan Jun or Jade with or without it, in true Cat Noir fashion, he'll keep his identity a secret, likely out of paranoid fear she'll assume he's decided to resume his ancestor's work (as he wasn't present for Crimson Lord's redemption, he might believe she'd be skeptical about it). This might cause some romantic drama.*
Part of Lan Jun's quest in the next season will be to try and find a way to give her mother her body back
Knowing how Crimson Lord did it, she might not break more of her armor to try and restore her mother, especially if Xin-Qi remains as an energy being even with a humanoid form, instead opting for a way to give her an actual human body again. Blue Lynx will return as a rival before actually changing her ways
Pearl and Lan Jun haven't fully talked out knowing each other's secret, and there's also the fact Pearl wants to make her mom proud. Lest Black Tiger actually retires, Blue Lynx might remain an antagonist in future episodes until Jade puts her on a more heroic path. The next threat will involve the other rogue Beasticons unleashed by the destruction of Crimson Lord's armor
To show Xinyan's character development, he might end up having to reason with his former comrades, faced with the same stubbornness and other flaws he had before he decided to give Lan Jun a chance. In a twist of events, Jade's armor will be infected one day
Either by an incomplete shard absorption or a rogue incantation, Lan Jun might find herself losing control and becoming aggressive and obsessed with getting her way, requiring her Beasticons to stop her before she either hurts someone or herself.