In a recent interview Glee series creator Ryan Murphy made a shocking revelation when asked about the future of the show and how old the kids are.
“The thing about the show that’s important is we try to be real, but it is also a fantasy high school,” he says. “I don’t know. We’re still trying to get through [season] one. I think it’s important to have new voices and new kids come in [each year]. That’s definitely something that we’re doing.”
This obviously could mean that the show will go the way of Saved By The Bell and try to keep the current cast as long as possible but is not adverse to a complete overhaul when they move into college.