A young man discovers a journal from the future (writen by a future version of him-self) and makes it his mission to attempt to prevent the events that lead to the apocalyptic future from happening; such as mutant fly attacks, alien invasions, zombie infections, evil clones, time vortexes and activists.

Thanks! yea that was some good stuff. I have modified it so now he knows the state of the future based on the journal. Now it is a matter of him and others actually believing it. Another thing worth knowing is that the hero is terrified of the future. He doesn't know what he wants to do with his life, and is scared all his friends will move on and leave him behind. So in a way, when he finds this journal, it doesn't scare him, no matter how bleak the future is, because he for once feels he has control and knowledge of it. The reason he takes on this task to save the world/his city is an attempt to further keep his friends and them "hanging out" essentially.

If he dosen't know how bad the future is why does he act?

The inciting incident is him being told the world will end there for he needs to take action to stop it. This event in which he is given this knowledge must be on screen or page and must happen to him to motivate him.

Yea... its actually for a comic book :p

And well he can't possibly know how bad and bleak the future is. But I set it up so we see it within the first five pages of my first script. But basically if that future comes to be, and he is the catalyst for it, the world will be in ruins, his friends dead, and evil will be ruling (for what purpose, still working that out. Got how it will end, just don't know if I want that empty: We will rule it all - especially when the world is in ruins, what is there to rule? You know.