I will start, Yorick makes a horror movie.

Cho'Gath makes an alien invasion movie.
Spoiler alert, the aliens win.

Thresh. Underworld horror.

Nunu. Basically Star Wars episode VII re-featuring Hoth.

Ryze could do something like harry potter

Thresh...non stop terror, chains being a very common theme in the movie with a recurring childrens rhyme being recited by souls of the long forgotten as each addition to his collection is freshly picked from the garden of souls.

Vi. A super fast paced action movie with alot of fist fight scenes.

Fizz directed this movie about this shark who takes revenge on the evil humans
Its called Jaws, hear it's quite good

Miss fortune. Some Pirate exploitation flick.

Shyvana
Epic fantasy dragon movie of firey awesome