I'm still working on Chapter One, which is starting to look like it'll be in the neighborhood of 100 pages (I'm drawing page 79 right now...), and I have a minimum of 5 chapters planned, although that number might easily rise. I have a script for Chapter One, but I've been fairly loose in following it -- I've cut whole scenes out for redundancy, changed how things happened (while still arriving at the same plot points), and I've revamped the ending entirely to be both more satisfying and, uh, easier. I predict I'll be done drawing this chapter around early October... two years after I started drawing it.
I sort of hope Chapter Two is shorter, but I have my doubts.
sigh
I draw a page a week, so... I'm going to be at this a while. Good thing I like doing it.