I’m probably in the “last to know” category on this one, but…
I found out today from an article on the ONION’s AV CLUB (http://www.avclub.com/content/feature/primer_alan_moore) that in the late 80’s following the success of WATCHMEN Alan Moore was asked to construct and write a universe-spanning crossover for DC.
I think we all know that DC and Alan Moore went their seperate ways pretty soon thereafter, but not before he could write-up a pretty cool sounding synopsis–which can be found here:
http://fourcolorheroes.home.insightbb.com/twilightfree.html
Not surprisingly its pretty detailed and lengthy(it prints out at 19 pages).
Alan Moore–never the slacker.
Enjoy!