Oh. My. God.
Okay, this definitely has got to be a parody, because you cannot watch the freaking trailer without laughing at the hilariousness of the situation. Poisonous snakes on a plane? Seriously. This is like a bad SciFi Channel movie or something, plus they changed the name of the movie from Snakes on a Plane to the acronym SOAP --- just adding on to the ridiculousness of this entire thing, aren't they. Although I'm guessing they thought it would be good because Samuel L. Jackson is starring. Dude, that's just insulting the Samuel L. Jackson, which I think they should just change the title to SOAMFP (Snakes on a Motherfuckin' Plane). It doesn't necessarily mean it'll be any better, but dammit it does give it a cooler sounding ring to it.
This is just too hilariously bad to even pass off in the box office. It's one of those things where it sounds interesting in theory, however when filmed it looks horrifically absurd. Perhaps it should be a comedy? I don't know, but still it's pretty damn corny even for a comedy/parody.