I'm really looking forward to this flick. Y is an amazing comic full of rich characters, great humor and action. Plus it has a pretty clever sci-fi concept: What if every male mammal on Earth, except for one man and his monkey, died on the same day? The Web site Bleeding Cool claims to have gotten a hold of Vaughan's early script for the film. They say it's a very early draft that has likely already gone through a number of changes, but their script review might still be worth a read.
If this is really Vaughan's early script, then it can probably give us a good idea of how the film will eventually turn out. According to BC, Vaughn first imagined the Y movie as a very stripped-down version of the comic that focuses on Yorick's journey across the new world. A lot of the smaller characters and scenes from the book are cut out, but the script still has the same tone and ideas present in the book. BC says the script is "shorter, concentrated, and more punchy" than the book, and that's OK by them. The script apparently reads a bit like a mystery. The BC boys say that it helped Vaughan land a gig writing for Lost.
Vaughan is reportedly working on a new Y script with Caruso and Disturbia co-writer Carl Ellsworth. 2011 can't come soon enough.