First, Keanu Reeves told The Independent that Bill & Ted 3 has a script:
"Yeah, we have a script. We're trying to put it together. It's a good script too."
Later, Alex Winter confirmed on Twitter:
"Script done? Check. -We love it? Check. -Green light? Working on it!"
So there you have it, pending a green light, you may soon be seeing aged Bill & Ted at a theater near you.