2019 will be the show's 20th
anniversary. I'm hoping for some kind of anniversary complete release that year at the latest, but if we don't get anything by then, we might not get anything for a long time yet.
On that note, it's a damned shame that CN's really only release PPG and Samurai Jack completely. I'd really like to see Courage, EEnE, Billy and Mandy, and KND all get proper releases.