There were a few other [HeroClix] characters that got worked on to lesser stages but never finished, but not many. The sculptors worked on pretty tight schedules, and most times a sculpt that didn't get used in one set would be folded into a future set. There are only a few I can think of where that hadn't happened by the time I left WizKids, like a giant-scale Watcher that might have become an event dial at some point. The biggest bunch of unproduced sculpts were actually for the ToonClix game we worked on for years; the sculptors made a ton of great sculpts (and we made a great game!) but the game never made it out, unfortunately.
Seth Johnson, HeroClix World Interview (2009)