the Abbot & Costello meets Fankenstein / dracula film. both funny but also horror.

The Fog.

a movie about how they trapped Radu Molasar in The Keep. the armies that sacrificed themselves or the priests or wizards / witches or all of them to hold the evil in place while The Keep was built around them or lured the evil into The Keep.

I always viewed The Keep as a offshoot of The Twighlight Zone's The Howling Man.. its never how they trapped evil, its how evil is released upon the world..

make a movie on trapping the evil & how that happened...& who's left to guard the evil from ever getting out.