Beatdown: Fists of Vengeance - the game had awesome customization, but the animations were a bit stiff. A properly funded remake would be cool, but will never happen - ever, lol.
Eternal Champions - besides being an awesome series in general, I always loved Shadow and would love to see a revamped version of this franchise.
No One Lives Forever - similar to Eternal Champions, this was also a high quality series. Cate Archer is amazing, but for whatever reason the series died out. No one bought it, I guess.
Age of Conan - a flawed gem, never really recovered from the buggy launch. The fatalities were amazing and the combat voicework was topnotch. Would love a sequel, but there is no chance in hell that will ever happen, lol.
Wet, Bloodrayne, Velvet Assassin, Buffy - all third person action games that starred a female protag. Buffy actually had decent ryona animations and Wet had some amazing QTE fails. But yeah, a revamped version of any of those would be cool.
Ok, that was more than just one. Breaking Tonug's rule of choosing only one, lol. Still, it's cool to think about the potential of past games revamped with some decent ryona content. Most will never happen, unfortunately.