Correct me if I’m wrong here, but in the sample new format for 2017, did they not have Dublin and Tyrone in the same Super 8 group, along with the beaten Munster and Connacht finalists or the team that beat them?
with the other group being:
So in 2018, based on it being a Leinster v Connacht and Munster v Ulster year under the previous format, the groups would be:
Leinster winners, Connacht winners, Ulster runners-up, Munster runners-up.
ie. based on expected results, Dublin and Mayo would be in the same group.