Telltale should give Clem to Campo Santo after Season 3 ends (If she survives)
I think by the time season 3 ends it would be best for Telltale to give the character to the Game Developer Company Campo Santo. The main reason why Campo Santo would be the perfect company to continue Clem's story is because one of the co-founders of the company is Sean Vanaman.
Sean Vanaman as most us know was the main writer for season 1 of the walking dead game and he had also created the character, Clementine. No one knows Clementine better than Sean Vanaman. He could use the character for future projects. (Maybe a Clementine walking simulator like Firewatch) He might have to get permission from Skybound to do just that. I honestly don't know if Sean is still interested in continuing Clem's story. His company is currently preoccupied in developing an unknown original I.P.
This would be a perfect decision for Telltale to make because they're not quite sure if they want to continue doing the walking dead game series and also Telltale has lately put Clem on the sideline in season 3. They're more interested in focusing on other characters like Javier instead of Clem. It's also a perfect decision because Clem's story would continue beyond the Telltale Game series. This will bode well for the future of the character because her story would no longer be limited to the Telltale gameplay mechanics that has grown kind of tiresome. A Campo Santo game about Clementine would be a fresh and new gameplay experience for Clementine fans.
Even if the game is a Firewatch 2.0, I would still be cool with it because Firewatch did a great job focusing on the characters. Honestly what Telltale, Skybound, or Sean would do with the future of Clem's character is beyond me. I am after all an internet commentator is who is just suggesting an idea and trying to get this idea out there.