Nothing's been made clear yet beyond the fact that there will be a RHatO comic come June and that's at least something, We'll be getting more news later about the finer points like whose in the book beyond Jason. It could be that Roy remains a member of the Outlaws. I'm not as convinced as some people are that he's destined to make regular appearances in the Titans book and even if he is there's no reason he couldn't appear in both.