Tape Monsters: A group known as the Rights & Justice has fought against the terrorist organization Blood River for nearly three years, when suddenly bodies of the some of the remaining terrorists are starting to show up around the city, in what could easily described as quick bloodbaths. After the realization of a new threat that's not human, Rick Dwayne (Leader of the Rights and Justice) recruits a captured terrorist in the hopes they can help stop their neutral enemy that threatens all of humanity.
Cast: Knowing this is a more original idea from myself (Though I'm sure the plot itself is just as simple as it gets) I've never really thought about a cast. To be honest I'd want new blood, people you just couldn't associate with anything else. The villain character is the only one where there is definate need in his voice, if anyone has seen Transformers Prime (An animated Transformers show and probably one of the better ones) I'd want a mix between the Starscream voice and Megatron voice, something in between that line would be fantastic, for me it's kind of hard to describe the voice I want.
I'd also say it'd probably be separated into 3 parts because the story is so large (And because if I didn't it'd probably be at least two hours a movie or at least pretty close to it.)