(Ugh,I hte the summer.)
Something tells me it should be about humanoid creatures that are dead spirits and tell people what do without that person knowing.That's been in my wasteland of an imagination for a week or 4.
How about a scientist that is afraid of dying that wants to live long into the future, so he creates a syrum that will make you live forever by keeping your body strong and maintaining your cells. Something goes wrong, not sure what it'll be yet.
How about scientists see a massive meteoroid heading for Earth, causing the destruction of all species on the planet, and they have 40 days to evacuate?