I'd love to see Geist be made into a movie. Imagine the fun that could be had watching the ghost dude take over stuff and scare the crap out of people, and update it so when he took over people he gained the knowledge of fighting skills they had. Plus a kung-fu mouse fighting a dude so he could get taken over...could work.
Well, it'd be a hard thing to pull off, but well done would be cool, that or Infamous...only do it Clue style, where you randomly start with an ending, then at the point of no return, go back with a thing saying "this ALSO could have happened"...that'd be pretty nifty, or just make 2 movies, Infamous and Guardian, same plot, same actors, different choices changing the story, would be instant 2 movie ticket sales if liked first, and the one that was more popular could give out something cool either game wise or movie wise, like the last week of running that particular movie got an extra scene shown, or an exclusive trailer to some really kick ass movie coming out that just got announced or something