>>3
You don't "spoil" a good movie by giving away its ending. If anything, knowledge aboutt he ending improves anything but the cheap shit that's only interesting - and not very much so either - because you just wanna know how that crap ends and get out of the theatre.
Best books often "spoil", so to say, their endings multiple times themselves.
"Here's the bad guy, here's the good guy, here's what happened between them. Wanna see how it went?" is a formula for a good story.
"Here's something out f nothing, wanna see if it means something or not?" is a premise for cheap-ass pulp thriller and such.