It's true, there is a need to limit these entries to a minimal amount of information. I wouldn't advocate adding a list of episodes or any sort of guide to the entry. Updating a count when an episode is released would just be a way of keeping the list from getting stale once all extant projects are added.
It would also---no offense to works-in-progress out there---make it easy to distinguish between projects that have actually completed something, and those which have yet to do so. Anticipation is great, but people who'd use a list like this probably would prefer some indication in that regard.