I don't like characters who are immortal...
If someone turns up and Tellale couldn't kill them off without breaking canon and getting trouble then that character makes it boring...
It needs to be possible at any time for a character to be brutally killed...
If they have a good reason for including the TV show characters, sure. I liked what they did with Glenn. It was a tie-in but it wasn't overt and you didn't need to know about to appreciate his character. They should just have a valid reason or a specific idea in mind for the character that they use. Don't just throw random TV characters in just for the sake of it. It'd just seems beneath them at this point.
Comments
If someone turns up and Tellale couldn't kill them off without breaking canon and getting trouble then that character makes it boring...
It needs to be possible at any time for a character to be brutally killed...
In the FAQ about the first season, you can read :
"Is this game based on the comic books or the TV show?
Why would telltale want to make a season 2 based on the TV show now? It would bring a complete lack of cohesion in the storyline IMHO...