Exactly. None of them were ever fully realized. If you're going to introduce new characters, you develop them; a full visual design, character background, what they can do, maybe even define their personality. They haven't done this with any of these name drops and scribbles. A great example of how the proper procedure in developing new characters is the old Mattel licensing guide and the MOTU Filmation pitch. Both of these documents show full character designs, a description/bio, and what they do. All of this should be developed prior to introducing a new character. Scott hasn't done this. It's a solid point that shows he should hand over any new creative content to professional writers, character designers, and toy developers.
The only new character that has been prolific has been the Mighty Spector. Surprise, surprise.