Supposedly Arrowsmith part 2 is next up after Pacheco does his Superman/Batman arc. His arc is, of course, due about the same time as this Green Lantern run should be hitting shelves. DC has shifted talent around before. Especially since people really, really liked Ivan Reis' work on the Secret files issue. John Byrne loves Green Lantern almost as much as the Doom Patrol. I'm sure he would chuck whatever he was doing to do a GL series or mini instead.