Now if Snape did this in canon it would have made fr such a much more entertaining story, but alas JKR seems a bit stunted in this area of writing up to a point.
Snape is being the Porper Slytherin and I think it will save the secondary lot (Zabini, Knott, Davie, Greengrass) but the three Sttoges(Draco,Crabbe,Goyle) will meet an appropriate fate.
Other then Hermione and to a lesser extent Ginny will Luna be a quirky sister-type or second love for Harry here?
Finally I suggest viewing a few more classic Spagetti westerns and a few Japanese Feudal era movies to give you a bit more inspiration.
They say The Samurai were the perfect Slytherins with words!
;-)
dennisud