World's End starts on Issue 13 for Stormwatch PHD. Not sure how much is carried over from the first 12 issues but I'm guessing that with the world ending, a lot of the old stuff is irrelevant so don't be afraid to start at 13.
After the shattering conclusion to NUMBER OF THE BEAST, Jackson King has once again resumed the role of Weatherman, taking StormWatch in a startling new direction! But what role does StormWatch have in this dramatic, deadly new world? Plus: the fourth and final chapter of the John Lynch backup story that began in WILDCATS: WORLD'S END #1, written by Christos Gage and illustrated by Trevor Hairsine (X-Men: Deadly Genesis)!
The surviving members of StormWatch find their satellite existence isolated and difficult, and now the satellite is reaching its breaking point. Can the team reach out to an old foe for help? And will their efforts result in a new understanding or an old brawl? Plus: Part 4 of the Wetworks backup story by Gage and Badeaux!
StormWatch receives a distress call from the Earth's surface and an old ally rears his head – Jon Drake, leader of The Establishment! But the happy reunion doesn't last long as he brings news of newly awakened Soviet-era doomsday machines preprogrammed in the event of a nuclear war to seek out and destroy the United States! And the fourth chapter of the Marc "Backlash" Slayton back-up story concludes, by Christos Gage and Mike McKone!