Doom Saber
Super Freak
I don't know if they were canceled figures, so much as an attempt to get more sales for folks to kitbash supporting characters that didn't warrant their own figures. But you could be right about that. They definitely did the Prison Break guys again because the company/sculptors weren't happy with the stock sculpts in hindsight.
It is a sound theory since the TT figs they made once they got ultra realistic with the face sculpts where the Prison Break guys, Obama, Prince Harry, "Gambit", Jake Gyanhall, and IM 1 Rhodes.
The African slim TT was announced shortly after it was reported that the actor who played Jim Rhodes in IM 1. It was also rumored that the Gambit figure was cancelled because of how poorly the Wolverine movie did. Harry and Obama falls into public figures. Ht also made license figs with the PB guys and JG. My point is that they had the license of the properties these actors appeared. I think rather than letting the license for an actor's likeness get unused like the Enterbay Dragonball Bulma fig, HT used the likeness for their "generic" TT line.