I've browsed the wikia's site and they've got a little bit of information about what Furman's plot was going to be for the series for the rest of the series #4 to #6 but not really that much.

I found some scans from #4 but they're pencils and not very clear.

What I'm curious about is does anyone have any information on those uncompleted issues? If anyone could help, it'd be greatly appreciated

And if not, any ideas on how u would've liked it to finish?