Today the Warhammer Community Team has recorded for us which rules they suggest used for Age of Sigmar 2nd Edition events. None if it is really surprising but having the list in the pic above really does help organizers and players as they approach the event get ready for it.
You can read more of what was said here
https://www.warhammer-community.com/2018/08/01/1st-aug-pitched-battles-in-the-mortal-realmsgw-homepage-post-2/