really the only head I want is Filmation Skeletor.
FILMATION HORDAK with a Filmation Skeletor head should be the order of the day.
I could see figures of Filmation Clawful & Filmation Tung Lashor. Heck, just from this thread I realized that a sculpted Filmation Grizzlor would be drastically different enough to be a figure too! and he could come with Filmation Leech Head. I dont want Mr. Big Lips, but hey, it'd be a great pairing for many fans. And frankly though I feel no need for it, if I got a Filmation He-Man head, I'd slap it on the TRU 2Pac He-Man and it'd be pretty tops!
But just heads? Filmation Skeletor. I would make do with a FILMATION HORDAK head and repaint a Hurricane Hordak. But I'd rather a dedicated release.