Hero and the Terror w/ Chuck Norris
Very riffable with Chuck Norris as the "hero" (duh) and the mute Krypton criminal guy from Superman II as the "terror". My favorite moment was when Chuck takes his 9-month pregnant girlfriend to the building where he suspects the killer is hiding. It also has more than its fair share of "tender moments", which just serve to showcase his awful acting.
The book this movie was based on was dark and disturbing. The movie... typical Chuck schlock. Would definitely make for a great Rifftrax.
Sounds promising. Is there a trailer somewhere?