From Newsarama this is part of an interview with Charles Soule check out the full interview here.
Nrama: We already talked about the Machine Kingdom and Bacteria avatars that appear in the Swamp Thing issue, but what can you tell us about Red Lanterns: Futures End #1? Guy is a Blue Lantern?
Soule: Yeah, he's a hopeful, hippy-dippy Blue Lantern.
Nrama: I'm having a tough time imagining that right now, but I can see where it would be fun to imagine.
Soule: Yeah, it's fun. You're not going to think of Guy Gardner as a Blue Lantern. In the Red Lanterns issues, he's a huge hothead. He's a biker gang dude.
So the idea that he would now be someone who has embraced hope and peacefulness and all that is a real change.
Finding out how he got there, and why he got there, and what he's trying to do now as a Blue Lantern is the story.
Also, I don't now if people had a chance to check out the Red Lanterns Annual yet or the big "Atrocities" story that's finishing up, but right before Futures End, we end with this gigantic battle issue where half the cast doesn't make it. And all these terrible things happen. And it's really traumatic and terrible.
So the Futures End issue stems directly out of those events. But it's just one path. One way things could go. But it's going to feel like a nice coda to that big "Atrocities" event.