Since Ben 10 has Ben 10: Alien Force, why can't JCA have a spinoff? Here's my idea:
Jackie Chan GX
The story takes place two years after Drago and Shendu's banishment. Jade is now in high school, along with her best friend Colleen. Her grandfather owns a Celtic shop not far from Uncle's rare finds. Then, two boys come in seeking the Celtic necklace Colleen wears, which is a family heirloom. Jade recognizes the two boys as Hsi Wu and Drago. Colleen follows them and ends up captured by them. They take her to the void. When they got there, Colleen finds that Drago and Hsi Wu's family have been turned into stone by three trouble-making goblins. They took Drago's chi powers away and blackmailed him and Hsi Wu into getting them the necklace. Then, they double-crossed him by destroying the demons and taking the talismans. It turns out that Colleen's necklace is really one of four elemental keys given to four light magic druids by St. Patrick himself. They were used to seal the Goblin Prince and his army away. Colleen joins with Drago and Hsi Wu under the guidance of Jade, Tohru, Jackie and Uncle, forming the J-Teens.
I'll give my arc ideas tomorrow.